It depends on the course. If an instructor is licensed to give out certificates, it will be included in the course description along with the requirements to get the certification. For most courses you will get a Certificate of Completion issued by Petrolessons certifying that you have completed 100% of that particular course. You can certainly brag about it! Post it on your office wall! Add it to your linkedin profile!
Some courses will also qualify as a Continuing Education credits / PDUs (Professional Development Units) many institutions such as PMI require 1 hour training for 1 PDU.