<ac:structured-macro ac:name="excerpt">
  <ac:parameter ac:name="hidden">true</ac:parameter>
  <ac:parameter ac:name="atlassian-macro-output-type">BLOCK</ac:parameter>
  <ac:rich-text-body>
    <p>This is the <strong>text</strong> I want to reuse in other pages. This text is inside an Excerpt macro.</p>
  </ac:rich-text-body>
</ac:structured-macro>