The general settings section allows you to customize some of the background information that you can collect from students and what they can see after they submit.
For assessments where students can make corrections, enable Edit After Submit. Student will then be able to review and make corrections to an question that they have entered.
If doing a survey of responses you can allow students to See Summary Chart and Text Responses to see an overview of what the class thinks. These are anonymous and students won't be able to tell who said what.
The presentation settings are used to customize how the form is presented to your students.
If you are using multiple sections you might want to enable Show Progress Bar this lets your students see how far they are in the assessment and helps them gauge how much time they can allot for the remaining questions.
To help curb cheating you can enable Shuffle Question Order to make each student get a different order of questions on the form.
If you want to reassess students you can use the Show Link to Submit Another Response. This give will give a new form identical to the original. While this might not be the best way to reassess, it could be a way for students to review and study for another reassessment.
By typing in a Confirmation Message you can customize the final statement to your students. You can leave instructions on what to do after the assessment or details about reassessments.