Olympics is a worldwide large sports games involving different countries. The host for the game will need to delvelop suitable sports centre, sports field, employ many people in order to get things well. Moreover, many facitilities and hotels & accommodation are also required for the huge no. of atheletics, spectators, and other people etc. for staying during the games.
As a result, Olympics will help the host city to develop and people there will get employed for different type of jobs. So the economics and world status of the city will improve a lot.