The document discusses memes, their origins and definitions. It notes that memes were first coined by Richard Dawkins in 1976 to describe units of cultural transmission. Memes spread ideas and content rapidly online through social sharing on platforms like Facebook, Twitter and Instagram. There are different types of internet memes like image macros, videos and words. Brands have started using memes for marketing by creating original memes or adapting existing popular memes. Factors that influence a meme's spread include emotions, storytelling and usefulness. The document also provides examples of brands that have successfully used memes.