pry-byebug combines the interactivity of Pry with the step-debugging capabilities of Byebug, allowing Rails developers to set breakpoints, step through code, and explore runtime state interactively. 

Setup is trivial: add it to the development group, require it in your console, and use commands like `step`, `next`, and `continue` in Pry sessions.
 
Alternatives include just using byebug or leveraging IDE debuggers in RubyMine or VS Code.