I have 4 sites on same niche and they all are hosted on same dedicated server. Does it effect SERP on any other seo term. Is it good or bad for seo or doesn't effect anything. I haven't linked them to each other content is different on each site but they all targeted for the same keyword. Many peoples suggested that it not good some says it okay,it doesn't effect any seo term but one thing should keep in mind that never linked them to each other. What are you suggestions...?