Do all search engines give credits to links / Page Rank?
A4. Yes, all search engines give credit to incoming links. Page Rank is a term coined by Google. Other Search Engines might call it differently but most of them do give weightage to this concept. A link pointing towards your website translates into external opinion about your website. It is an off page factor to determine whether your website is relevant. If a search engine finds a link pointing towards your website, it gives your website the weightage or value of that incoming link based on the quality and relevance of the link.