What is birthday copypasta?

Birthday copypasta is a type of content that is widely circulated on social media platforms and online forums to celebrate someone's birthday. This content is usually a pre-written message, image, or video that users copy and paste into their own birthday greetings, adding their own personal touch or message. Birthday copypasta may also include jokes, memes, or other humorous content to entertain the recipient. It is a way for people to show appreciation and love for their friends, family, or online acquaintances on their special day.