The video aims to explain functions in mathematics in about seven minutes, emphasizing its importance and widespread difficulty among students. The main objective is to strengthen the fundamental understanding of what a function is. The speaker introduces himself as John, a math teacher, and founder of Taba Class Math. Functions are illustrated using examples like f(x)=3x^2+1, where f(x) is the function name and it is equivalent to the equation 3x^2+1. Different types of functions like quadratic functions are mentioned, along with notation like g(x) and h(t). A function is described as a rule where input values are manipulated in some way. The video encourages viewers to check out an algebra course for a more in-depth understanding of functions.