Google says it has improved search and the SERPs with quotes to web page content, including snippets, iframes, Alt text, Meta Description, and content rendered through Javascript.
It also said "Quoted terms won’t appear in web page snippets if they only appear within title links or URLs of a web page. We also do not bold matches that happen in title links and URLs."
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blog.google...]
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| blog.google |
| How we're improving search results when you use quotes |
| How snippets in Google's search results are being improved by forming them around where quoted words or phrases occur in a web document. |
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