The primary application of meta tags used to be in the optimization of a web page for
search engine rankings. Keywords and descriptions were used by the search engine
algorithms to judge how closely a web page matched a given phrase. Nowadays, however,
few search engines take any notice of meta tags that specify page keywords due
to their misuse and tendency to lead to irrelevant material. Instead, search engines
tend to base their results on the page content itself. Google, for example, will only
use the meta tag “description” to accompany a search result, but ignores meta tags
altogether when it comes to judging a page’s rank. It bases its results primarily on
content, the page title, and also terms that are used to link to the page in question.
So is there any real point? Meta tags certainly aren’t the force they used to be
when it comes to search engines, but they can still be used to convey useful
information about the page. Even if an application doesn’t directly use a meta
tag, someone looking at the page source itself could still benefit from such
information. Another common value for the name attribute is “copyright,” which
won’t be directly used by anything (such as search engines or browsers), but can
be used to point out copyright information to a casual observer. On a large-scale
site with multiple developers, you could also use meta tags to convey information
about a page that means nothing to the outside world but can help internally.
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