Edebug, instrumenting and stepping and breakpoints. Also macroexpand and how it helps with debugging.
On this page of the site you can watch the video online Debugging basics with a duration of hours minute second in good quality, which was uploaded by the user Nic Ferrier 10 October 2014, share the link with friends and acquaintances, this video has already been watched 9,475 times on youtube and it was liked by 154 viewers. Enjoy your viewing!