In your Google classroom, its handy to have resources available for your students to use, just as they would in a traditional classroom. Here you can post any materials or instructions for the class, such as a classroom rules or links to often used websites. These and more resources can be all be added in the class resource page and accessed by all students and related teachers.
To add class resources, firstly choose the class that you want to set up the resource bank for and, at the top of the page, click about. At the bottom of the page you'll see a box labelled "add resource".
Click in this box and type the name of the resource that you want to add. You can then add the resource, which can be a file, a Google Drive item, a YouTube video or a link to a website.
When you've added the resource, it will be listed below the "add resource" box and you can edit it or delete it by clicking the three dots at the right of the dialogue box and choosing the relevant action.
As you can see, this is a really simple way to build up a bank of resources for your Google classroom.