What really is a Classification or Regression Tree?

There are different models in machine learning based on several intuition that help come up with a final prediction. Similar to how there cam be various methods to solve mathematical problems and we have to choose the best, especially in numerical methods, we also know that some methods are more suitable (give more accurate results) for certain types of problems, in the same vane, there are several models in machine learning and some are better suited for certain types of data problems and a good machine learning engineer can make an excellent choice without much trial and error.