What is muggles?

Muggles are individuals in the fictional world of Harry Potter who do not possess magical abilities and are thus unable to perform magic. They are the non-magical population of the wizarding world and are often depicted as ignorant of the existence of witches and wizards. The term "muggle" was first introduced in J.K. Rowling's novel Harry Potter and the Philosopher's Stone and has since become a popular term in popular culture. In the Harry Potter universe, muggles play a significant role in the story, often serving as a contrast to the magical world and providing a sense of normalcy.