It is a Bible with concise commentaries which are series of notes explaining of passages of scripture. They may explain the language used in the section of text or they may explain the historical background of it. Since it is written by human authors, it reflects their beliefs and perspectives. Commentaries are widely used in personal Bible study. One caution concerning Bible commentaries is that they should not be used instead of personal study; rather, they are designed to use in addition to personal study. Since commentary itself is not scripture, it's important to the reader to weight what he reads against other sources, as well as his Spirit led analysis. As the product of fallible people, commentaries are not necessarily correct in every word. Hence, trust only the word of God.