What is the most common type of footwear worn in the world?

The most common type of footwear worn in the world is sandals. Sandals are an ancient form of footwear and have been worn for thousands of years in various parts of the world. They are simple in design and consist of a sole attached to the foot with straps, thongs, or other fastening systems.

Sandals are popular in many cultures because they are comfortable, lightweight, and airy, making them perfect for hot weather. They are also easy to put on and take off, which makes them ideal for people who need to move quickly or frequently. In addition to being worn as everyday footwear, sandals are also worn for religious or cultural reasons in some parts of the world.