I run a number of sites and only one of them keeps going in and out of
search results. For example, one of my sites is ranked #1 for the last
2 years on a particular search phrase, the phrase that really
identifies it. Never varies, always on top.
Then there is another site that's been up since the beginning of this
year. It's been ranked #1 or #2 for the last few months when
searching for particular words that identify it. Last Thursday it
disappeared from SERPs, came back this Monday. Now it's Thursday
again, it is gone from SERPs. Moreover, the page with the highest
visits after the index page is gone from cache as well.
Any thoughts?
Thanks.