The document discusses the role and history of major political parties in Pakistan. It provides background information on each party, including the Pakistan Peoples Party (PPP), Pakistan Muslim League (N) (PML-N), Pakistan Tehreek-e-Insaf (PTI), Pakistan Muslim League (Q) (PML-Q), Muttahida Qaumi Movement (MQM), and Awami National Party (ANP). It notes that the PPP is the largest party and has been active since 1967, while the PML-N is the second biggest party led by Nawaz Sharif. The PTI was founded by Imran Khan in 1996 and has emerged as a counterweight to the PPP