An entrance poll is like a survey that grown-ups take when they arrive at a big event, like an election or a concert. People who want to know what the grown-ups are thinking and feeling ask them questions about who they like or what they care about.
When someone goes to vote in an election, they might be asked to answer some questions before they go vote. These questions can help people learn more about who is voting and what they care about. For example, they might ask if the person is a man or a woman, how old they are, and what issues are most important to them.
By asking these questions to people as they arrive to vote, experts can try to predict who might win the election or what issues might be the most important to people. This can help people who want to win the election or make decisions about what issues to talk about.
So, an entrance poll is just like a survey that people take when they arrive at an event, and it helps people learn more about who is there and what they care about.