Article: Be careful when killing the large ones, as they will split. Once the slime is dead, back up a bit. Note that each one splits into smaller slimes. Consider it as multiplying.  When encountering a small slime, one hit from a sword will kill it, however a fist is advised because they are very weak and are a waste of sword durability. The little ones smaller than one block will attempt to kill you, but do no damage. Note that these will drop slime balls. For a medium slime, it will will split into small slimes. Kill the smaller ones. Medium slimes cause mild damage. For the large one, it will split into a medium slime, then kill as for medium slime. Large slimes cause moderate damage. If you get 9 slime balls, put them all in a crafting table to make a slime block, which is really bouncy! Another use for slime balls are that you can combine it with pistons to make sticky pistons, which allow you to move blocks forwards and backwards.

What is a summary?
Approach the slime and perform several criticals. Collect the drops, which are usually slime balls, and experience.