Comma (,)

Use a comma to separate elements in a sentence, such as items in a series, clauses or introductory phrases.

Use a comma after an introductory phrase.
Do
In MindTap, open your gradebook.
Use a comma before coordinating conjunctions in compound sentences, except where one or both of the independent clauses are fewer than four words.
Do
Navigate in the learning platform to the widget template, and then create ten accounts based on the template.
Don't
Navigate in the learning platform to the widget template and then create ten accounts based on the template.
Do
Click OK and sign out.
Don't
Click OK, and sign out.
Use a comma to separate the first and second items in a list of three items in a sentence.

Do not use the serial or Oxford comma after the second item except where specifically needed to avoid confusion. In this case, consider rewriting the sentence or using an unordered list.
Do not list more than three items in a sentence. Instead, use an unordered list.
Do
In the widget management page, you can:
- create widgets
- copy widgets
- delete widgets
- rename widgets
Don't
In the widget management page, you can create widgets, copy widgets, delete widgets and rename widgets.
Avoid overlong or complex sentences.
If a sentence is complex or longer than 25 words, consider:
- rewriting it
- separating it into multiple sentences
- presenting its contents in a vertical list