The Olivet Discourse is the longest section of Jesus' teaching that Mark recorded (cf. 4:1-34; 7:1-23). Mark used this discourse as a bridge between Jesus' controversies with Israel's leaders (11:27-12:44) and the account of His passion (chs. 14-15). It provides assurance that the leaders who had plotted against Jesus would suffer God's judgment.
Matthew and Mark both stressed Jesus' teaching that focused on His second coming. Matthew and Mark also recorded more about Jesus' answer to the disciples' second question, "What will be the sign when all these things are going to be fulfilled?"(13:4b). Luke concentrated more on His answer to their first question, "When will these things be?"(13:4a). Matthew wrote to answer the questions of Jewish unbelievers. Mark wrote primarily to respond to those of Gentile Christians living under Roman persecution and in a hostile world. Mark stressed Jesus' exhortations to watchfulness and His preparation of the disciples for future hardships.