diff --git a/public/app/features/alerting/unified/Silences.test.tsx b/public/app/features/alerting/unified/Silences.test.tsx
index c87a92581a5..6e361744962 100644
--- a/public/app/features/alerting/unified/Silences.test.tsx
+++ b/public/app/features/alerting/unified/Silences.test.tsx
@@ -60,7 +60,6 @@ const ui = {
     matcherName: byPlaceholderText('label'),
     matcherValue: byPlaceholderText('value'),
     comment: byPlaceholderText('Details about the silence'),
-    createdBy: byPlaceholderText('User'),
     matcherOperatorSelect: byLabelText('operator'),
     matcherOperator: (operator: MatcherOperator) => byText(operator, { exact: true }),
     addMatcherButton: byRole('button', { name: 'Add matcher' }),
@@ -210,6 +209,7 @@ describe('Silence edit', () => {
 
       const start = new Date();
       const end = new Date(start.getTime() + 24 * 60 * 60 * 1000);
+      const now = dateTime().format('YYYY-MM-DD HH:mm');
 
       const startDateString = dateTime(start).format('YYYY-MM-DD');
       const endDateString = dateTime(end).format('YYYY-MM-DD');
@@ -247,17 +247,13 @@ describe('Silence edit', () => {
       userEvent.tab();
       userEvent.type(ui.editor.matcherValue.getAll()[3], 'dev|staging');
 
-      userEvent.type(ui.editor.comment.get(), 'Test');
-      userEvent.type(ui.editor.createdBy.get(), 'Homer Simpson');
-
       userEvent.click(ui.editor.submit.get());
 
       await waitFor(() =>
         expect(mocks.api.createOrUpdateSilence).toHaveBeenCalledWith(
           'grafana',
           expect.objectContaining({
-            comment: 'Test',
-            createdBy: 'Homer Simpson',
+            comment: `created ${now}`,
             matchers: [
               { isEqual: true, isRegex: false, name: 'foo', value: 'bar' },
               { isEqual: false, isRegex: false, name: 'bar', value: 'buzz' },
diff --git a/public/app/features/alerting/unified/components/silences/MatchedSilencedRules.tsx b/public/app/features/alerting/unified/components/silences/MatchedSilencedRules.tsx
new file mode 100644
index 00000000000..e09479f3d2a
--- /dev/null
+++ b/public/app/features/alerting/unified/components/silences/MatchedSilencedRules.tsx
@@ -0,0 +1,116 @@
+import React, { useEffect, useState } from 'react';
+import { useFormContext } from 'react-hook-form';
+import { useDebounce } from 'react-use';
+import { useDispatch } from 'react-redux';
+import { css } from '@emotion/css';
+import { GrafanaTheme2 } from '@grafana/data';
+import { Badge, useStyles2 } from '@grafana/ui';
+import { DynamicTable, DynamicTableColumnProps, DynamicTableItemProps } from '../DynamicTable';
+import { RuleState } from '../rules/RuleState';
+import { useCombinedRuleNamespaces } from '../../hooks/useCombinedRuleNamespaces';
+import { Annotation } from '../../utils/constants';
+import { findAlertRulesWithMatchers } from '../../utils/matchers';
+import { fetchAllPromAndRulerRulesAction } from '../../state/actions';
+import { CombinedRule } from 'app/types/unified-alerting';
+import { MatcherFieldValue, SilenceFormFields } from '../../types/silence-form';
+
+type MatchedRulesTableItemProps = DynamicTableItemProps<{
+  matchedRule: CombinedRule;
+}>;
+type MatchedRulesTableColumnProps = DynamicTableColumnProps<{ matchedRule: CombinedRule }>;
+
+export const MatchedSilencedRules = () => {
+  const [matchedAlertRules, setMatchedAlertRules] = useState<MatchedRulesTableItemProps[]>([]);
+  const formApi = useFormContext<SilenceFormFields>();
+  const dispatch = useDispatch();
+  const { watch } = formApi;
+  const matchers: MatcherFieldValue[] = watch('matchers');
+  const styles = useStyles2(getStyles);
+  const columns = useColumns();
+
+  useEffect(() => {
+    dispatch(fetchAllPromAndRulerRulesAction());
+  }, [dispatch]);
+
+  const combinedNamespaces = useCombinedRuleNamespaces();
+  useDebounce(
+    () => {
+      const matchedRules = combinedNamespaces.flatMap((namespace) => {
+        return namespace.groups.flatMap((group) => {
+          return findAlertRulesWithMatchers(group.rules, matchers);
+        });
+      });
+      setMatchedAlertRules(matchedRules);
+    },
+    500,
+    [combinedNamespaces, matchers]
+  );
+
+  return (
+    <div>
+      <h4 className={styles.title}>
+        Affected alerts
+        {matchedAlertRules.length > 0 ? (
+          <Badge className={styles.badge} color="blue" text={matchedAlertRules.length} />
+        ) : null}
+      </h4>
+      <div className={styles.table}>
+        {matchers.every((matcher) => !matcher.value && !matcher.name) ? (
+          <span>Add a valid matcher to see affected alerts</span>
+        ) : (
+          <>
+            <DynamicTable items={matchedAlertRules.slice(0, 5) ?? []} isExpandable={false} cols={columns} />
+            {matchedAlertRules.length > 5 && (
+              <div className={styles.moreMatches}>and {matchedAlertRules.length - 5} more</div>
+            )}
+          </>
+        )}
+      </div>
+    </div>
+  );
+};
+
+function useColumns(): MatchedRulesTableColumnProps[] {
+  return [
+    {
+      id: 'state',
+      label: 'State',
+      renderCell: function renderStateTag({ data: { matchedRule } }) {
+        return <RuleState rule={matchedRule} isCreating={false} isDeleting={false} />;
+      },
+      size: '160px',
+    },
+    {
+      id: 'name',
+      label: 'Name',
+      renderCell: function renderName({ data: { matchedRule } }) {
+        return matchedRule.name;
+      },
+      size: '250px',
+    },
+    {
+      id: 'summary',
+      label: 'Summary',
+      renderCell: function renderSummary({ data: { matchedRule } }) {
+        return matchedRule.annotations[Annotation.summary] ?? '';
+      },
+      size: '400px',
+    },
+  ];
+}
+
+const getStyles = (theme: GrafanaTheme2) => ({
+  table: css`
+    max-width: ${theme.breakpoints.values.lg}px;
+  `,
+  moreMatches: css`
+    margin-top: ${theme.spacing(1)};
+  `,
+  title: css`
+    display: flex;
+    align-items: center;
+  `,
+  badge: css`
+    margin-left: ${theme.spacing(1)};
+  `,
+});
diff --git a/public/app/features/alerting/unified/components/silences/MatchersField.tsx b/public/app/features/alerting/unified/components/silences/MatchersField.tsx
index 96ee773c510..7464af9ef2f 100644
--- a/public/app/features/alerting/unified/components/silences/MatchersField.tsx
+++ b/public/app/features/alerting/unified/components/silences/MatchersField.tsx
@@ -128,7 +128,7 @@ const getStyles = (theme: GrafanaTheme2) => {
       min-width: 140px;
     `,
     matchers: css`
-      max-width: 585px;
+      max-width: ${theme.breakpoints.values.sm}px;
       margin: ${theme.spacing(1)} 0;
       padding-top: ${theme.spacing(0.5)};
     `,
diff --git a/public/app/features/alerting/unified/components/silences/SilencesEditor.tsx b/public/app/features/alerting/unified/components/silences/SilencesEditor.tsx
index e3d7b46499e..dd2bcdadf64 100644
--- a/public/app/features/alerting/unified/components/silences/SilencesEditor.tsx
+++ b/public/app/features/alerting/unified/components/silences/SilencesEditor.tsx
@@ -14,6 +14,7 @@ import { useDebounce } from 'react-use';
 import { config } from '@grafana/runtime';
 import { pickBy } from 'lodash';
 import MatchersField from './MatchersField';
+import { MatchedSilencedRules } from './MatchedSilencedRules';
 import { useForm, FormProvider } from 'react-hook-form';
 import { SilenceFormFields } from '../../types/silence-form';
 import { useDispatch } from 'react-redux';
@@ -79,7 +80,7 @@ const getDefaultFormValues = (searchParams: URLSearchParams, silence?: Silence):
       id: '',
       startsAt: now.toISOString(),
       endsAt: endsAt.toISOString(),
-      comment: '',
+      comment: `created ${dateTime().format('YYYY-MM-DD HH:mm')}`,
       createdBy: config.bootData.user.name,
       duration: '2h',
       isRegex: false,
@@ -164,7 +165,7 @@ export const SilencesEditor: FC<Props> = ({ silence, alertManagerSourceName }) =
     <FormProvider {...formAPI}>
       <form onSubmit={handleSubmit(onSubmit)}>
         <FieldSet label={`${silence ? 'Recreate silence' : 'Create silence'}`}>
-          <div className={styles.flexRow}>
+          <div className={cx(styles.flexRow, styles.silencePeriod)}>
             <SilencePeriod />
             <Field
               label="Duration"
@@ -197,18 +198,11 @@ export const SilencesEditor: FC<Props> = ({ silence, alertManagerSourceName }) =
           >
             <TextArea
               {...register('comment', { required: { value: true, message: 'Required.' } })}
+              rows={5}
               placeholder="Details about the silence"
             />
           </Field>
-          <Field
-            className={cx(styles.field, styles.createdBy)}
-            label="Created by"
-            required
-            error={formState.errors.createdBy?.message}
-            invalid={!!formState.errors.createdBy}
-          >
-            <Input {...register('createdBy', { required: { value: true, message: 'Required.' } })} placeholder="User" />
-          </Field>
+          <MatchedSilencedRules />
         </FieldSet>
         <div className={styles.flexRow}>
           {loading && (
@@ -235,7 +229,7 @@ const getStyles = (theme: GrafanaTheme2) => ({
     margin: ${theme.spacing(1, 0)};
   `,
   textArea: css`
-    width: 600px;
+    max-width: ${theme.breakpoints.values.sm}px;
   `,
   createdBy: css`
     width: 200px;
@@ -249,6 +243,9 @@ const getStyles = (theme: GrafanaTheme2) => ({
       margin-right: ${theme.spacing(1)};
     }
   `,
+  silencePeriod: css`
+    max-width: ${theme.breakpoints.values.sm}px;
+  `,
 });
 
 export default SilencesEditor;
diff --git a/public/app/features/alerting/unified/mocks.ts b/public/app/features/alerting/unified/mocks.ts
index 4ca25450aa4..b788c31fde9 100644
--- a/public/app/features/alerting/unified/mocks.ts
+++ b/public/app/features/alerting/unified/mocks.ts
@@ -16,7 +16,7 @@ import {
   RulerRuleGroupDTO,
   RulerRulesConfigDTO,
 } from 'app/types/unified-alerting-dto';
-import { AlertingRule, Alert, RecordingRule, RuleGroup, RuleNamespace } from 'app/types/unified-alerting';
+import { AlertingRule, Alert, RecordingRule, RuleGroup, RuleNamespace, CombinedRule } from 'app/types/unified-alerting';
 import DatasourceSrv from 'app/features/plugins/datasource_srv';
 import { DataSourceSrv, GetDataSourceListFilters, config } from '@grafana/runtime';
 import {
@@ -430,3 +430,22 @@ export const someRulerRules: RulerRulesConfigDTO = {
   ],
   namespace2: [mockRulerRuleGroup({ name: 'group3', rules: [mockRulerAlertingRule({ alert: 'alert3' })] })],
 };
+
+export const mockCombinedRule = (partial?: Partial<CombinedRule>): CombinedRule => ({
+  name: 'mockRule',
+  query: 'expr',
+  group: {
+    name: 'mockCombinedRuleGroup',
+    rules: [],
+  },
+  namespace: {
+    name: 'mockCombinedNamespace',
+    groups: [{ name: 'mockCombinedRuleGroup', rules: [] }],
+    rulesSource: 'grafana',
+  },
+  labels: {},
+  annotations: {},
+  promRule: mockPromAlertingRule(),
+  rulerRule: mockRulerAlertingRule(),
+  ...partial,
+});
diff --git a/public/app/features/alerting/unified/utils/matchers.test.ts b/public/app/features/alerting/unified/utils/matchers.test.ts
index 11cfe2f4d0f..68b47701bac 100644
--- a/public/app/features/alerting/unified/utils/matchers.test.ts
+++ b/public/app/features/alerting/unified/utils/matchers.test.ts
@@ -1,4 +1,6 @@
-import { getMatcherQueryParams, parseQueryParamMatchers } from './matchers';
+import { MatcherOperator } from 'app/plugins/datasource/alertmanager/types';
+import { getMatcherQueryParams, findAlertRulesWithMatchers, parseQueryParamMatchers } from './matchers';
+import { mockCombinedRule } from '../mocks';
 
 describe('Unified Alerting matchers', () => {
   describe('getMatcherQueryParams tests', () => {
@@ -33,4 +35,46 @@ describe('Unified Alerting matchers', () => {
       expect(matchers[0].value).toBe('TestData 1');
     });
   });
+
+  describe('matchLabelsToMatchers', () => {
+    it('should match for equal', () => {
+      const matchers = [{ name: 'foo', value: 'bar', operator: MatcherOperator.equal }];
+      const rules = [mockCombinedRule({ labels: { foo: 'bar' } }), mockCombinedRule({ labels: { foo: 'baz' } })];
+      const matchedRules = findAlertRulesWithMatchers(rules, matchers);
+
+      expect(matchedRules).toHaveLength(1);
+    });
+
+    it('should match for not equal', () => {
+      const matchers = [{ name: 'foo', value: 'bar', operator: MatcherOperator.notEqual }];
+      const rules = [mockCombinedRule({ labels: { foo: 'bar' } }), mockCombinedRule({ labels: { foo: 'baz' } })];
+
+      const matchedRules = findAlertRulesWithMatchers(rules, matchers);
+      expect(matchedRules).toHaveLength(1);
+    });
+
+    it('should match for regex', () => {
+      const matchers = [{ name: 'foo', value: 'bar', operator: MatcherOperator.regex }];
+      const rules = [
+        mockCombinedRule({ labels: { foo: 'bar' } }),
+        mockCombinedRule({ labels: { foo: 'baz' } }),
+        mockCombinedRule({ labels: { foo: 'bas' } }),
+      ];
+
+      const matchedRules = findAlertRulesWithMatchers(rules, matchers);
+      expect(matchedRules).toHaveLength(1);
+    });
+
+    it('should not match regex', () => {
+      const matchers = [{ name: 'foo', value: 'bar', operator: MatcherOperator.notRegex }];
+      const rules = [
+        mockCombinedRule({ labels: { foo: 'bar' } }),
+        mockCombinedRule({ labels: { foo: 'baz' } }),
+        mockCombinedRule({ labels: { foo: 'bas' } }),
+      ];
+
+      const matchedRules = findAlertRulesWithMatchers(rules, matchers);
+      expect(matchedRules).toHaveLength(2);
+    });
+  });
 });
diff --git a/public/app/features/alerting/unified/utils/matchers.ts b/public/app/features/alerting/unified/utils/matchers.ts
index ebef3ca3ed5..6979f8764bf 100644
--- a/public/app/features/alerting/unified/utils/matchers.ts
+++ b/public/app/features/alerting/unified/utils/matchers.ts
@@ -1,7 +1,9 @@
-import { Matcher } from 'app/plugins/datasource/alertmanager/types';
+import { Matcher, MatcherOperator } from 'app/plugins/datasource/alertmanager/types';
 import { Labels } from '@grafana/data';
 import { parseMatcher } from './alertmanager';
 import { uniqBy } from 'lodash';
+import { MatcherFieldValue } from '../types/silence-form';
+import { CombinedRule } from 'app/types/unified-alerting';
 
 // Parses a list of entries like like "['foo=bar', 'baz=~bad*']" into SilenceMatcher[]
 export function parseQueryParamMatchers(matcherPairs: string[]): Matcher[] {
@@ -24,3 +26,43 @@ export const getMatcherQueryParams = (labels: Labels) => {
 
   return matcherUrlParams;
 };
+
+interface MatchedRule {
+  id: string;
+  data: {
+    matchedRule: CombinedRule;
+  };
+}
+
+export const findAlertRulesWithMatchers = (rules: CombinedRule[], matchers: MatcherFieldValue[]): MatchedRule[] => {
+  const hasMatcher = (rule: CombinedRule, matcher: MatcherFieldValue) => {
+    return Object.entries(rule.labels).some(([key, value]) => {
+      if (!matcher.name || !matcher.value) {
+        return false;
+      }
+      if (matcher.operator === MatcherOperator.equal) {
+        return matcher.name === key && matcher.value === value;
+      }
+      if (matcher.operator === MatcherOperator.notEqual) {
+        return matcher.name === key && matcher.value !== value;
+      }
+      if (matcher.operator === MatcherOperator.regex) {
+        return matcher.name === key && matcher.value.match(value);
+      }
+      if (matcher.operator === MatcherOperator.notRegex) {
+        return matcher.name === key && !matcher.value.match(value);
+      }
+      return false;
+    });
+  };
+
+  const filteredRules = rules.filter((rule) => {
+    return matchers.every((matcher) => hasMatcher(rule, matcher));
+  });
+  const mappedRules = filteredRules.map((rule) => ({
+    id: `${rule.namespace}-${rule.name}`,
+    data: { matchedRule: rule },
+  }));
+
+  return mappedRules;
+};