This is nothing new, but it seems to have gone rather unnoticed. Already in 2009 Google made it officially clear. Neither the meta tag “keywords”, nor the meta tag “description”. Google does not take it into account as a ranking factor. Matt Cutts’ words are exactly:
“Even though we sometimes use the description meta tag for the snippets we show, we still don’t use the description meta tag in our ranking.“
People abuse metatags (keywords and description), stuffing them with irrelevant keywords. In Matt’s words “Because the keywords meta tag was so often abused, many years ago Google began disregarding the keywords meta tag”.
In fact, Google has a kind of unwritten law that would be “if the user doesn’t see it, I don’t take it into account”. That is why it gives so much importance to the TITLE Tag, as there is no possibility of “cheating”, as the TITLE always appears in the same place, with the same format, in the same location. Not like in the case of any other content on the web, with which you can make works of art with CSS.
The Meta Description Tag is very important
The Meta Description Tag is very important, as it appears on the Google results page, below the TITLE. This means that its role comes into play when you have already positioned yourself, because at that moment the user must choose between 10 (or more) results on the Google results page. It is then that we must “convince” the user to click on our result before the others. This is why you should think very carefully about what you write in this meta tag, as this is what the user will read.