Could you brief bit more.It is the google dance most likely. However, be sure to check your Google Search Console for possible penalties.
I went 2nd to 9th positionLost your ranking a couple of spots or not showing in top 10 pages?
What should I do then? Making backlink by manually isn't a bad thing?Google Dance is basically when Google purposely drops your rankings to check if you try to remove recently built backlinks thinking that it's a penalty. By doing this they can find out if you're manually building links which is considered 'black hat' and against Google's policies.
What should I do then? Making backlink by manually isn't a bad thing?