Groot is a fictional character in the Marvel Comics universe and is best known for his appearance in the Guardians of the Galaxy movie franchise. He first appeared in "Tales to Astonish" #13 in 1960, but it was not until the 2000s that the character became more widely recognized.
Groot is a sentient alien tree-like creature, and his vocabulary is limited to only saying "I am Groot." Despite his limited verbal communication skills, Groot has shown incredible strength, durability, and regenerative abilities, making him a formidable ally in battles.
In the Guardians of the Galaxy movies, Groot is portrayed as a loyal and brave member of the team, who is willing to sacrifice himself for the greater good. In the first movie, Groot sacrifices himself to save his friends, but he is later reborn as a small sapling. In the second movie, Groot is portrayed as a baby version of himself, which adds a comedic element to the film.
Overall, Groot is a beloved character in the Marvel Universe, known for his unique appearance, limited but endearing vocabulary, and unwavering loyalty to his friends.