You would think that one of the simplest questions that any evangelical Christian would be able to answer is this: What is the gospel?
After all, isn't that the very defining aspect of everyone who identifies himself or herself as an evangelical, that they are committed to the evangel, the gospel?
A number of scholars have pointed out that what evangelicals usually call "the gospel" is not quite the same as what the biblical writers meant by "gospel". Examples of this would include N. T. Wright and Scot McKnight among others. Evangelicals tend to think that the gospel is exactly the same thing as the message of salvation – a step-by-step guide for how sinners can be forgiven, find peace with God and start a new life – but these scholars distinguish between what is specifically meant by "the gospel" itself in the New Testament and the message of salvation which is always one of the New Testament's great implications of the gospel. But the call to trust and follow Jesus in order to find salvation is not the "gospel" itself as narrowly and specifically defined in the New Testament.
The gospel or good news is the proclamation or announcement of a fact, the fact that Jesus of Nazareth is the Messiah, the King of Israel, died for our sins and has risen from the dead to be the rightful the Lord and Saviour of the world. The gospel is in fact the story of Jesus which shows that he is the King and Saviour of the world.
The message of salvation is obviously closely linked with the gospel, but not identical to it. The message of salvation for us flows out of the story-fact that Jesus came to earth as Saviour and Lord.
The salvation message is that no one is right with God as they are, everyone needs Jesus to save them because he is the King and Saviour of the world, and Jesus is willing to save anyone who comes to him. The gospel or good news is the proclamation of who Jesus is and what he has done. Both parts are important because it is only because of who he is that he could do what he did and it is only because of what he did as well as who he is that his gospel can then become our gospel – good news for people like you and I who are not right with God and need salvation.