Does light have gravity and if so, how does it affect the behavior of light in the universe?

Light does not have mass, so it does not have gravity in the traditional sense. However, according to Einstein's theory of general relativity, light can be affected by gravity. This is known as gravitational lensing, where light bends around massive objects like stars and galaxies, altering its path. This phenomenon can distort the appearance of distant objects and provide insights into the distribution of mass in the universe.