If you have been online for a while, you have likely encountered references to meta keywords, which are used to tag posts and pages online. However, what many people don’t realize is that using these tags will not help your search engine rankings.
If this is of interest to you, I highly recommend you read this brief informative article Meta Keywords: why I don’t use them by Joost de Valk.
Also, check out the following video of Google Engineer Matt Cutts: