Lets be very loud and clear about this fact that Google doesn’t use Keywords and Description meta tags for search rankings. Its not something new but Google has not been using it for several years now.

If you even have the slightest doubt then just read what Google explained about meta tags on its Official Webmaster Central Blog here. It clearly states that keywords meta tag is not used as a ranking factor, simply because anyone can stuff keywords in meta tag irrespective of the page content. This is being ignored by Google in ranking factor right from its early days (some 10 years back .

So what about description meta tag? Well Google does use it to show search snippets sometimes but its still doesn’t use as a ranking factor.

You can read the full blog post on Official Google Webmaster Central Blog and there is a video too explaining this.