If you were to jump up as high as you can, gravity would pull you back down to the earth. If you were standing on another planet and jumped up, you might be able to jump higher, or maybe not as high.
How strong the pull feels depends on how big the planet is. On planets with more mass than earth, you would feel heavier, and on planets with less mass you'd feel lighter. (Mass just means the amount of "stuff" the planet is made of.
To figure out how much you would weigh on the other planets, multiply your weight here on Earth by the following numbers: