what is the advantage of using meta tags in word press posts over the key words that are part of your url string? example you write an article about dogs and your example url would look like www.mysite.com/labradors so with "labradors" already in my url string, why would i want to use meta tags
There are some search engines that still rely on meta tags for ranking sites. Though they are not the big engines like Google, it still helps build organic traffic.