Start a new paragraph for each new idea: "A new paragraph signals a shift to a new idea and provides a pause for readers--a chance to assimilate one step in the conceptual development before beginning another" (APA, 2020, p. 115). As a guide, a paragraph should contain three to eight sentences.
Resources
Purdue University, On Paragraphs
Studiosity, How to structure paragraphs using the PEEL method
Reference
American Psychological Association (APA). (2020). Publication manual of the American Psychological Association (7th ed.).