I currently optimized a keyword its current position when i start working is 11 after my participation it jumps to 10 for 4-5 hour but after this period it jumps to 16.I used all techniques regarding seo i also used back link packets for different seo but not any response.
plz help me.

It may be because of the stored cache. Try clearing it and then give it a try.

If you have logged in gmail then sign out and again try to check.

I clear history and cookies but the issue is same again.

If you signed in any google accounts and search for your keywords it shows in the first page. so i think you signed in any google accounts when u saw your keyword ranked in some 10th position.

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