Test functions for optimization

Test functions for optimization are like puzzles that help us figure out the best way to solve a problem. For example, imagine you have a box of Lego pieces that you want to put together to build a toy house. You can use a test function for optimization to figure out what the best way to put it together is. It might tell you which pieces to use first, where to put them and how to put them together. This way, you can build the house in the most efficient way possible.