The purpose of this study is identifying the influential factors in creating query suggestions. The query suggestion has become one of the most fundamental features of web search engines that help user formulate the query and meet the information needs by providing possible keywords. In this research, in order to identify the effective factors in creating the query suggestions a systematic review has been used. For this purpose, keywords of English and Persian language related to query suggestions have been searched in foreign scientific databases such as Science Direct, Emerald, Scopus, Online Willy, IEEE and internal databases of Magiran, Scientific Information Database of Jihad, and Cilivica to find articles related with the effective contextual factors in creating query suggestions. In order to systematic review, the method of Wright et al. was used that include seven steps: determination of research question, determination of protocol, literature search, data extraction, quality appraisal, data analysis and result. After searching for Persian and English keywords and matching them with entry and exit criteria, 36 articles were selected to extract effective factors. The findings of the systematic review in the field of the query suggestion show that five factors of location, time, user search sessions (including the user’s current search session and user search history), hybrid factors, and other contexts were effective in creating query suggestions. Identification of the influential factors in creating query suggestions helps researchers and those who are interested in this domain to use appropriate contexts in accordance with the characteristics and conditions of the search tools and help the user to retrieve more relevant information.