The language of the snake! Known to be, according to the TIOBE Index, the most popular programming language at least in 2023, used by countless beginner and senior developers throughout the world to create hello world applications and super complex, highly accurate, mind-blowing machine learning and artificial intelligence models, all of this with its horrible whitespace-based syntax and awful looking docblocks.
Even though it has a lot going for it and against it, it is the most popular language, and knowing/using it gives us a great advantage in terms of collaboration and code reuse. Given its size, it's to be expected that they might already have a library for that application that you need to build, or if you thought of something novel and want to build a library for it, most likely if you publish it you are guaranteed get many downloads and maybe even some contributions.
One of the most important aspects of any language is its project structure. If you are building simple one-of scripts hacked together quickly just to perform a task none of this is needed, but as soon as you want to build something that might get used by others or that you might want to publish later in a package manager you need to use the language's proper structure for that. Here are some resources on the topic: