Democrat Kamala Harris faced Republican Donald Trump on Tuesday in the U.S. presidential election, after the two candidates vied for support by staking positions on issues including abortion, the economy and foreign policy.

Exit polls help us better understand who came out to vote, how different groups of people voted and how they feel about some of the biggest issues of the campaign.

With Election Day upon us and millions of Americans lining up to cast their ballot, some may also complete exit polls. Here's what they mean.