If you want to return to a place you like, then you will want to make a landmark. Other people may also give you landmarks, suggesting you go visit. And when you buy things, often, the package will contain a landmark to the store. In short, lanrmarks are the fast easy way to hop from place to place in SL.
To create a landmark yourself, for the place where you currently are, click World > Create Landmark Here.
A window will open showing the details saved in the landmark and when you close it, it will be stored in inventory.
You can access the landmark at any time by opening your inventory and opening your Landmarks folder.
Home is the location that you teleport to when you choose the menu item "Teleport Home" or press Ctrl-H.
You can set this location with the menu command
World > Set Home to Here.
Home may be set to land that you own, land that a group you are a member of owns, or any area that allows anyone to set their home there. (such as an InfoHub or Help Area)