Getting Started with Target Dummy

1. Craft a Target Dummy from a hay block and an armor stand - the hay gives it a body and the stand gives it a frame. (Check the in-game recipe book for the exact shaped recipe.)
2. Place it on the ground where you want a testing range.
3. Start hitting it. Damage numbers and a DPS counter appear immediately.

To remove it, break it like any block - it drops back as an item.