The Cannon Tower is a second era defensive tower. Compared to other two-orb towers, the Cannon Tower has quite a lot of hit points, making it one of the most survivable. Another major advantage of the cannon tower is its ability to knock back small units, which can allow even a single cannon tower to defend against most first and second era units without taking too much damage. Played in combination with Kobold Trick, Shield Building, or Skyelf Templar, the Cannon Tower can be played as a fixed-position tank.
The main disadvantage of the Cannon Tower is its inability to attack flying units, which can make it vulnerable to enemy flying units if left alone without ranged units. Pairing a Defense Tower with a Cannon Tower allows ranged units to be defended against, while the Cannon Tower knocks back ground units.
Another disadvantage of the cannon tower is that it is somewhat less able to shoot past friendly buildings that are between it and its target compared to other towers such as the Defense Tower. This means that one must be careful when placing Cannon Towers to ensure that they will be able to shoot approaching enemies.