Recommends with Attenuation Factor: 0.0006976738Also looking at this pair of tags <section/> inside <span/>
  • The parent tag <section/> with the Content model section and the child tag <iframe/> with the Categories section have matches: Flow content

first tag section

<iframe/>

Contexts in which this element can be used

Content model

BrowserWeb HTMLWeb APICanIUse
FirefoxYes1+--
SafariYes3+--
Chrome1+1+--
OperaYes12.1+--
Edge79+79+--
Edge (Legacy)12+12+--
Internet ExplorerYes5.5+--
Firefox AndroidYes4+--
Safari iOSYes1+--
Chrome AndroidYes18+--
WebView AndroidYes1+--
Samsung InternetYes1.0+--
Opera AndroidYes12.1+--

Result of the ability to include a tag in a tag

Yes, you can!
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last tag section

<section/>

Contexts in which this element can be used

Content model

BrowserWeb HTMLWeb APICanIUse
Firefox4+----
Safari5+----
Chrome5+----
Opera11.1+----
Edge79+----
Edge (Legacy)12+----
Internet Explorer9+----
Firefox Android4+----
Safari iOS4.2+----
Chrome AndroidYes----
WebView AndroidYes----
Samsung InternetYes----
Opera Android11.1+----