Notepad, which is built to every computer running Windows, is a useful tool for jotting down quick, well, notes or ideas that can be easily saved, accessed, and shared. That said, it is a very basic program with little in the way of formatting options. In fact, until Windows 10, it didn't even support one of the most basic formatting options in the form of Word Wrap. Luckily, Notepad++ addresses the need for a more robust yet accessible text tool.
Notepad++ can be considered a sort of jack of all trades. With this comes a sort of added complexity. Simpler programs can be found in Notepad and its alternatives, though you would be giving up features that Notepad++ offers: features like autocompletion, support for multiple languages, and a variety of formatting options.
As Notepad++ is a Windows exclusive app, it may be necessary to use alternatives available on macOS and Linux.
If you're looking for a text editor more focused on having a featureset comparable to an integrated development environment, software like Geany and its alternatives might be more your speed.