Why my website home is not on google suddenly !

My website yesreplica on dozen previous of google page, I also see it on this morning, but there is not on this evening, and a strange thing is that I have no update my website a long time, Do the google kill it, please tell me the case!Thanks!

For maintaining the rankings/position in search engine result pages you need to promote it continuously through on-site and off-site optimization. New changes/updates are basically the food for robots to visit/indexing the site.

If you are doing link building on your site and stop doing that, I think that is be the cause why your website was not in Google..You better not stop link building your site, Link Building is a continuous process..And another reason your website is not yet on the Top 10, if not, It's ranking is not yet stable..