Instagram is a popular social media platform that allows users to share photos with captions and filter effects with their followers. Key features include photo filters, sharing posts to other social networks, and tagging people in photos. While open to all ages, most users are under 35. It is considered social media because it enables sharing memories and photos with other users in a way that defines social media. For the author, Instagram is an important way to document life experiences and memories with friends and family.