im trying to make an up to date chart of meta tags, for all of us, with their purposes, their use and their good (or bad) effects on search engines/being found. Also any body knows new/promising meta tags? I will add yours into my list so this chart is a result of live discussion and up to date. Also, it would be creative to invent your own useful meta, because we are the ones making the web, or aren't we?
P PURPOSE? What does this meta tag do in 2011, if anything
N NECESSARY? Does every site really needs it or not?
G GOOD wether it will have a good effect for your site to be found
I INVENTED meta tag, who knows it will be accepted in a year!
META "METANAME" = PURPOSE? - NECESSARY? - GOOD EFFECT? #### important meta "title" = P consice summary + teaser - N very - G extremely meta "description" = P description + teaser - N yes - G very meta "robots" = P if needed, to skip default dmoz/yahoodir listing - N no - G? #### new & promising! Thanks for input (John, ) meta "original-source" P url of whoever broke the news gets credits - N? - G? meta "syndication-source" P url for syndication of published news - N? - G? meta "canonical" P? - N? - G? meta "google" = P to hide the [Tranalate this page?] set it to "notranslate" #### seems obsolete meta "keywords" = P some keywords - N+G not for google but yahoo likes them meta "language" = P overrule guesswork by defining language - N no - G? meta "page-topic" = P topic/theme - N? - G? meta "abstract" = P short summary - N? - G? meta "copyright" = ? #### invented by me meta "audience" = P filteres audience: "+seniors, +parents, -children, -youth" meta "mood" = P specifies textual style: "discussion, informative, commercial, sexual, fictional, scientific, romantic, therapeutic, technical"