This video is a part of our Cypress Testing Tutorial series for Beginners. In this video, Chris DeSilva (@desilvadev) will help you understand what are Cypress custom commands and how these can be used to change the default behavior of the built-in Cypress commands. It also demonstrates how you can create a new command altogether. This video also deep dives into the major differentiation when it comes to adding new Cypress commands and overwriting existing commands in Cypress framework.
You will also learn 
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What are Custom Commands in Cypress?
How to create Custom Commands?
How do I add a Custom Command?
How do I run a Custom Command?