Final answer:
In Word 2016, spelling errors are showcased by red wavy underlines and grammar errors by blue wavy underlines. Users should check these carefully as suggestions from the check may not always be correct.
Step-by-step explanation:
In Word 2016, potential spelling and grammar errors are indicated by wavy underlines. Specifically, spelling errors are displayed with a red wavy underline, whereas grammar errors are indicated by a blue wavy underline. These visual cues help users to identify and correct mistakes in their documents, ensuring proper grammar and correct spelling. It is important for users to review these areas as the software may not always make the correct suggestions and may sometimes miss errors. Additionally, users can use the spelling and grammar checking tools for a more comprehensive review of their documents.