What you do with that power is entirely up to you.
Primarily it is for automating web applications for testing purposes, but is certainly not limited to just that.
Boring web-based administration tasks can (and should) also be automated as well.
Products
S Bot Editor (Free)
S Bot Editor is a visual programming editor for selenium and pywinauto. It is based on Google's Blockly, which has been forked to generate Python code.
S Gmail checker is a software that allows to quickly check the status of "good", "disabled", "verified", "not exist" of gmail accounts just enter the username.
Free: 100 gmail check/time, 1 thread
Premium: 10.000 gmail check/time, multi thread
Price: 100$/year