Your CCW license or permit will give you the legal ability to carry a concealed weapon in your home state. Depending on the type of CCW class taken, your home state’s license will also be valid in other states. Likewise, CCW license holders from other states may be able to carry when visiting your state. This is reciprocity.
Reciprocity has become a bit of a puzzle, trying to find the right pieces (permits) that will give you the ability to carry in the highest number of states. To that end, many CCW holders who travel are licensed in multiple states.