The seat map makes it clear where the tickets are located and what the prices are. Generally, the higher the price, the better the ticket.
Some people prefer to be close to the stage to see the actors as close as possible, but understand that they might not be able to see the entire stage at once. Others prefer to sit farther away or in the mezzanine so that they can see the whole stage picture. No matter where you sit, you're still seeing a great show!