Here you can see how the last line of meta description changes as per the query in case 2, when pdf word included in query Google displayed a new line from the content in meta description with pdf word in it.
The criteria used by Google to come up with new title are:
- Something that is “relatively” short
- Have a good description of the page and “ideally” the site that the page is on.
- And that it is relevant to the query.
SEO Impact:
