Google Webmaster Tools - HTML Suggestions
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See below for screenshot and explanation of HTML Suggestions.
Here are the Google webmaster tools categories as they look when you are logged in (left).
Webmaster tools - Diagnostics - HTML Suggestions
The "HTML Suggestions" category is a very useful tool in that if a problem is found, you can take immediate action that will ultimately improve your website's SEO and thus it's Google rankings.
Here is a interesting Google Help on writing titles and descriptions and also how Google automatically compiles the titles and descriptions to make up the "snippets" that appear as your listing on a SERP.
Here is what a screenshot of the "HTML Suggestions" category looks like in Webmaster tools (below). Also see further down the screenshot (below) of Hardweb's three reported "Short meta descriptions" which shows that 8 words is not enough for a decent meta description!?
Screenshots on this page are copyright © 2016 Google Inc.
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