In float fishing the reel needs to be light, quick and made for fine line. In this group you will find match reels and waggler reels. Both suit running line float fishing, where the float is cast further out than a pole can reach.
A match reel is light and has a shallow spool that lays fine line evenly. A fast retrieve brings the float and bait back quickly for the next cast, which matters when you fish actively and feed and recast often. Good line lay also reduces the tangles that fine line is prone to.
Waggler reels are designed for fishing with a waggler float. The float is attached to the line by its bottom end only, and the line is sunk below the surface so that wind and surface drift do not pull the float off line. That is why the reel needs to cast smoothly and lay line evenly.
Choose a reel to suit the length of your rod and the diameter of your line. A small, light reel balances a long match rod, making it comfortable to hold all day. A spare spool loaded with a different line lets you adapt quickly when conditions change.