What is the purpose of the 22nd amendment

The 22nd amendment limits the president to only two 4 year terms in office. no further more

The 22nd Amendment to the United States Constitution sets term limits for the elected President of the United States. Passed by the United States Congress on March 21, 1947, the 22nd Amendmentwas later ratified by the requisite number of states on the 27th of February in 1951.