Guys I have been around this forum for a while but I wanted to ask this question because my site has been acting strangely of late. It is holding on very stubbornly to its place in the SERP's. If a backlink gets indexed today, will the SERP change occur immediately or is there a delay before the rankings change? - Just for the sake of the question, assume that the backlink is not worthless and is of good quality. Thanks in advance for your replies.