What is the tl;dr of the tool? How does it differ from the description of its category, IDE?
PyCharm is an IDE meant for writing Python code. It has support for scientific tools and web application frameworks such as Flask or Django, as well as debugging, version control, testing, and database integrations.
Why use this tool over an alternative?
PyCharm is one of the only Python IDEs out there, with many features that aren't seen in the other alternatives.