Pepsi is a carbonated cola soft drink made by PepsiCo. A can of Pepsi (330ml) has 8 cubes of sugar in it, whereas Coca-Cola has 7.
They often sponsor (help fund/advertise on an event) sports events and music events, like the Super Bowl. Pepsi also has huge sponsorships for the MGM Mirage hotels in Las Vegas, Nevada. They only serve Pepsi products at the hotels.
Pepsi comes in many different flavors, and forms. A few of the different Pepsi types include Diet Pepsi, Pepsi Max, Pepsi ONE, Crystal Pepsi, Pepsi Wild Cherry, etc.