When you do something freely, you act without restraint or control by anyone or anything. Weekends are best when you can freely choose when to wake up and what to do with your days.
Many people spend their childhoods yearning to be older so they can freely live their lives. On a smaller scale, if you let your backyard chickens roam unchecked around your property, they can move freely; and if you ice skate on a lake instead of a small indoor rink, you can move freely, in any direction, without being scolded. Freely comes from free, with its Old English root freo, "acting of one's own will."