Hi, Everyday we are doing manually Off-page work for our website. Also our site has good position on SERP. But now again our site has decreasing his position day by day. What is the false for our site. Previously it was 17th position on Google's SERP, now it is 103th position. Where is the fault?
since I don't know what is the website and keyword phrase you are talking about what I can say is that your competitor could be doing much better off-page work than you did.