Within the context of English as a foreign language (EFL), using blogs has emerged as a language learning tool. However, how teachers effectively incorporate blogs within the confines of an instructional framework and what the current research shows about using blogs as a learning tool remain unsolved issues. Thus, the current paper presents a review of the research on the use of blogs in EFL learning contexts. The study first introduces blogs and a theoretical framework for the use of blogs within the borders of the constructivist approach. Then, in accordance with the studies reviewed, the research is divided into the following five sections: effects on (1) the awareness of the target culture, (2) interaction and communication, (3) basic language skills, (4) learners' motivation, perceptions and attitudes, and (5) autonomous learning. In conclusion, while the current literature reflects that using blogs is a valuable and effective technique that can be readily used in the context of EFL, more research is necessary. Finally, the paper ends with practical recommendations for EFL teachers and researchers.