The tradition of giving return gifts has been practiced all over the world for thousands of years. These were not limited to wedding return gifts, but were a common practice in most parties and celebrations.
Some of your guests might have travelled long distances to attend your weddings and participate in the ceremony. Some others might be missing work or something else important to be there for you. Since your friends and family have put their lives on hold to grace the biggest day of your life, it is expected that you show them appreciation in return. They will love that you took some time out from your busy schedule and picked the perfect return gifts for them.