Abstract
Search is one of the most challenging and interesting problems in information retrieval system. Many studies have been published related to this problem. To date, web searcher is facing with information overload phenomena. Information overload is a situation where too much information, therefore user need to filter the useful information from the abundance of information published on the web. Due to these phenomena, user satisfaction towards the search result has also decrease. This paper investigates the factors that affect user search satisfaction. Initially, user knowledge has been found as the main contributing factor. The overview of user knowledge and other factors is discussed in this paper.