Design patterns are design level solutions for recurring problems that software engineers come across often. It’s not code but it is a description on how to tackle these problems and design a solution.
Using these patterns is considered good practice, as the design of the solution is quite tried and tested, resulting in higher readability of the final code.
There are about 26 Patterns currently discovered. You can check this for more details
https://www.freecodecamp.org/news/the-basic-design-patterns-all-developers-need-to-know/
