A lolcat is a picture of a cute or funny cat with a caption written in a silly or humorous way. It became popular on the internet because people found it funny and enjoyed sharing them with their friends. The captions are usually written in a way that makes the cat seem like it is speaking or thinking in a silly way. Sometimes the words are spelled incorrectly on purpose to make it sound more funny. Overall, lolcats are just meant to make people laugh and feel happy.