A YouTuber is a person who creates and shares videos on the platform YouTube. These videos can cover a wide range of topics, such as entertainment, education, lifestyle, gaming, or reviews. YouTubers often build a following by posting regular content and engaging with their audience through comments and live streams. Some YouTubers gain fame and make money through advertising, sponsorships, or merchandise sales. They may also collaborate with other creators or participate in trends to grow their channels and reach more viewers.