The phrase "great demonstration" means a remarkable display or example of something, usually showing a particular skill or concept in an impressive way. Full definition
Great demonstration of range of opportunities available with a limited palette. (arttutor.com)
There are also many tutorials online that give great demonstrations on how to pill a cat. (bestfriends.org)
So why not bring your best canine friend and join the Main Street Veterinary Hospital team for a fun - filled day starting with a walk, and then continuing with great demonstrations, contests, and games. (mainstreetveterinary.com)