It is a big honor to become the United States president and the most challenging job. There are many works to be done or get the results done in their term of four or eight years. Even when their term as president is over, they will continue as public figures. They are expected to attend events, fundraising, speeches, and take interviews. It is more like a commander in chief.
They are not eligible for any major decisions, but their job stays with them for several years. They have to keep all the information secretive, which is more important for the country. There are specific rules that they have to follow from driving cars to different aspects of their life till the state funeral arrangements: