Once you have created a Test or a survey you will need to provide your users access to it. ClassMarker calls this 'Assigning'. Look out for the 'Assign' buttons across the website.
There are 2 ways to give access, depending on your needs:
When to use Groups?
Create Groups and register members into your Groups.
Group members can access Tests and surveys assigned to their Group.
Groups are great for testing/surveying the same users on a regular basis.
Example: Teacher/Students, or Business/Employees doing regular testing.
See: Assigning via Groups
When to use Links?
Links are great for 'once off' or 'bulk' testing/surveying. No need to pre-register users.
'Access restriction' options are available for additional security.
See: Assigning Tests/surveys via Links
See: Embed your Test/survey on your website
Saving Results with links is only available with Upgraded Accounts
Note: These 2 options can be used separately depending on your requirements for giving Tests or surveys, but not combined. (E.G: No need to register users to Groups if you want to give them Tests/surveys using the Links option).