Land claiming is very easy. First you need to create a claim team, which is needed for land claiming. Create such a team, using /team create <name>. Invite players with /team <name> and kick players with /team kick <name>. After creating the team define the claim positions. Go to the first position and use /pos1 and then go to the second position and use /pos2. After doing this use /claim and the area between the two positions will be your new claim. You can set a claim home using /team sethome and you can teleport to your claim home using /team home. If you want to delete your claim, use /claim delete inside your claim and the claim will be deleted. You can have up to 10 claims and the two claim positions can be up to 70 blocks apart.