Hello: I find two of my sites get big jump of google index over night,one had 120-130 index number of google yesterday,but this morning it become 1190,the other had 250 index number yesterday,now it has 1080,very strange and interesting,I met the same thing one or two months ago,my another site also got big jump on google index.that time I thought it was accidental so not pay much attention.I do nothing with this two sites only updated regularly anyone has any idea?
Most likely, G finally got around to doing a deep crawl of your sites. Major jumps, either up or down, are common. Usually, it is almost impossible to tie those jumps to any particular cause.
this kind of "good stuff" never happen on me Yes, i believed due to google deep crawl on your site but not sure how this happen Anyway, it is a good news....congratz
If it fall very much, its normal. Will be back to normal. If little changes, your ranking decreased - thats bad.
This is very normal .. This is Google algorithm > After making these kind of changes Google will test your site's performance ...if ur website's performance is well.... then it's ok .. other wise Google will down your website .