When you go to someone's house or a special place like a temple or mosque, people often take off their shoes at the door. The reason for this is that shoes can get very dirty and bringing that dirt into someone's home or a holy place is not polite.
Also, some people believe that removing shoes is a way of showing respect and humility. In some cultures, feet are considered dirty and walking into someone's home or temple with shoes on would be seen as disrespectful.
So, when you go to someone's house or a place of worship, make sure to take off your shoes and leave them at the door! It's a way of being polite and showing respect.