Some basic roles of political parties are : assisting the electoral process, organizing the government and nominating candidates for election.
Explanation:
Political party comprises of group of people who shares same ideology about the function and scope of government.
Party who wins election gains control over the government. For this, each party is supposed to nominate candidates for a position in government.
Nomination of respective political parties candidates takes place in primary stage of election. These nominees are decided by voters vote.
Once the candidate is nominated, they need to work individually and are supposed to make their own campaign to win the general election and be in government. Here, role of their political party is very less.