Forum Moderators: Robert Charlton & goodroi
Google has a lot of hiccups. They change and move around fairly often. To me, DAILY monitoring is excessive, but hourly?!?
Give it a rest and let the dust settle. Too often I read webmasters panicing over serps changes, and doing changes on their sites they should not have done.
Google is slow to do any permanent (if that word can even be used in conjunction with google) and knee jerk reactions to serps changes can hurt more then help.
The time to worry is when the fluctuations end, and they will end, and you find you have lost position, no for just one day (or hour) but a month or so.
Changes to your site, and the effects in google serps is like watching a video in slow motion. Make a change, wait forever, see the change. Tying to pick up the pace will have you changing things that were optimal as they were, and possibly in the heat of panic, making things worse.
Webmastering is almost like gardening, you can't change the ferts on your plants and expect an instant change, doing so might result in the death of the plant...
Specifically, my daily (ok, sometimes hourly) research shows that there may be 2, or more, sets of results that switch off.
Like I said, I am having a hard time interpreting the results...
When searching for a paticular term, for a couple, or sometimes several days at a time, two of my images will come up on the first page of Google's image results. Alternately, on other days, two images from a separate website of mine will come up in the first page of results, for the exact same search term.
Rarely, if ever, do all four images come up in the search results for that search term.
Though both of the domains in question are located on the same server, they do not share the same IP address.
I can't figure what is going on, at all, and I would not be writing this post, if the Google search engine results showed any sign of not updating daily or hourly.
When does this "settling down" happen?
there may be 2, or more, sets of results that switch off
Google has several hundred data centers around the world. The data is not the same on all of them - sometimes there's latency in updating it, and sometimes they are doing various kinds of testing. When you query Google, complex load-balancing sends your query to a specific IP address/data center - and which one you see can vary within a second. You can install the ShowIP add-on in Firefox to see which Google IP is responding.
Now even within one IP address, there's still a chance that some multivariate testing is going on, especially with the image results that are integrated into the SERP. How Google is weaving together their "Universal Search" is not a fully transparent process, and they are also turning the dials on it, testing different ways of weighting the different types of vertical search that are integrated into Universal Search.