A poll is essentially a Recommended List in reverse. A Recommended List lets you create a list of your favorite games in a particular category, to share with the rest of IFDB. A poll turns the tables: it lets you ask everyone for recommendations for some particular kind of game you're looking for.
The category can be anything you want it to be. Just describe what kind of game you're looking for.
Once you create a poll, it will appear on the IFDB home page, inviting other members to submit their "votes" - suggestions for games that fit the category. As the votes come in, they'll show up automatically on the poll's page, so you can check back from time to time to learn which games people have recommended.
A nice feature of polls is that anyone can see the results, so everyone can benefit from the recommendations. So a poll essentially becomes a collaborative Recommended List built by the whole IFDB community.