The popular form of proportional representation is the single transferable vote. In this system, voters rank candidates in order of preference, and seats are allocated based on the total number of votes received by each candidate. The system ensures that every vote counts and reduces the risk of wasted votes. It also promotes diversity and representation of minority groups in the government. However, it can be complicated and may require voters to have a good understanding of the candidates and their policies. Additionally, the counting process can be time-consuming, which may delay the announcement of election results.