Whats were the main purposes of the counter-reformation

The Counter-Reformation (Latin : Contrareformatio), also called the Catholic Reformation (Latin: Reformatio Catholica) or the Catholic Revival,[1] was the period of Catholic resurgence initiated in response to the Protestant Reformation, beginning with the Council of Trent (1545-1563) and ending at the close of the Thirty Years' War (1648). The Counter-Reformation was a comprehensive effort composed of four major elements