I often have clients inordinately concerned about the content of their meta keywords field as shown by viewing their page source. When I tell them, “Google totally ignores that field these days,” my statement is often met with stunned disbelief.
Here’s the word from the horse’s mouth:
On-page factors such as quality content with appropriate keyword density, proper use of keywords in page titles and headings, and off-page factors like quality backlinks with relevant anchor text from high-ranked sources are what matter – not a list of 100 keywords stuffed into the meta keywords field.
So – do your keyword research, write good content, pay attention to your titles, work for those backlinks – with the time you would be spending stuffing the keywords field on your website.
Go forth and prosper!