I am quite surprised with regard to the results of different queries made to Google search engine: for instance, at 10:00 I look for "cursos php", I get 6.690.000 answers, number one is my site,
www.portalmw.com, two hours later I repeat the query, my site is still number one, but the number of answers is only 2.200.000. Does someone know the reason of this difference?
Another query, "prensa internacional", number of answers: 4.700.000, my site appears as number nine. In a matter of hours, the number of answers is 2.020.000 and my site does not appear.
Normally I get, in both cases, the first situation, however, from time to time I find myself in the second situation.
Any idea?