A homogeneous function is like playing with blocks of different sizes. Let's say you have tiny blocks, big blocks, and even bigger blocks. But, there's a rule that you have to follow - you can only put together the same size of blocks. For example, you can't put a big block with a tiny block.
Similarly, a homogeneous function is a math rule that works like a game of blocks. It's like having different "blocks" or "terms" in a math problem. But, there's a rule that all the terms have to be the same size - this means they have the same degree.
For example, let's say we have the equation 2x^2 + 3xy. The first term, 2x^2, has a degree of 2 because x is raised to the power of 2. The second term, 3xy, has a degree of 2 as well because there are two variables, x and y, with one power each. This means that the equation is homogeneous.
Homogeneous functions are important in math because they have special properties. For example, if you multiply all the variables in a homogeneous function by the same number, the overall value of the function gets multiplied by that same number raised to the degree of the function. This rule is called Euler's homogeneity theorem.
So, just like the blocks in our game, homogeneous functions have to follow a rule of sameness. But, this rule allows us to understand and manipulate them in interesting ways.