Did you try taking a look at their homepage or GitHub README? They explain what it does quite well...

Programming is all about coding so i find nodeschool.io is the best when come to learning by doing for both express.js and node.js.

all you need to do is to install npm package manger and node if you didn't already . after that you will install express workshop using npm globally by executing this command

npm install -g expressworks and start the workshop by typing in the command prompt or terminal expressworks .

for further information check the workshop README.md .

Happy coding

Express is to Nodejs what Laravel is to PHP. In simple words its a simple framework, a glue of sorts that sits between the front end and the Database in nodejs apps