My site – the home page, which is a blogg post - immediately ranked as nr 5 on Google when I opened it up. This was for the main keyword, which is the same as the domain name of the site. (This result was to be expected, as most of the search results for this keyword are irrelevant or of low quality. My site is the most relevant, the biggest and it should be no 1.) Then I installed WordPress SEO. I was impressed by the program. On each page I added a main keyword (which is the same on almost all the pages), a meta title and a meta description. The program made a few complains and I made a few adjustments – mainly I changed the texts on the pages so that the keyword showed often enough to make the program satisfied. I also added some links and images. A few days after this, the home page was completely gone from Google. It is not on any of the 10 first pages of search results for the main keyword that equals my domain name. Some of the other main pages rank on page 3-10. WordPress SEO appears to be unaware of any problem. Any idea about what has caused this? It is possible that I added too many of the main keyword? (WordPress SEO says the keyword density is great.) Should I wait to see if the problem disappears or should I inactivate WordPress SEO and try some other program instead?