I was on TOP # 1 on google for a keyword search. On last Friday I added very few links (about 5), those are from quality pages. Then, my SERP dropped to # 14, then I added some more, now I am on # 25. I really wonder about the Google dance. Y google behave like this? How to over come this issue?
I guess - the problem will be with newly added links. Is that links are relevant for your site? Please check the nature of the newly added links - there may be chance for any spam content.. More over, please check your site - Google will penalize you like this only (dropping in SERP ranking) for spam content..