Safe Exam Browser is a web browser environment to carry out e-assessments safely. It limits your students to just the test page, so they can't click around and visit any other websites during the test.
To enable this feature for your test, go to the test Settings, and under "Security - Safe exam browser", choose YES to enable it. For extra security measures, you can enable the Config key and the Browser exam key.
Next to setting the keys per test, you can let your institution manager set default keys for the whole institution. These can be used besides or instead of the keys per test.
To read more about SEB, please visit the website here.