Supporting details are the facts, examples, reasons, and descriptions that explain or prove the main idea in a paragraph or essay.

Quick meaning

  • Main idea = the central point.
  • Supporting details = the information that backs it up.

Common types

  • Facts and evidence.
  • Examples and anecdotes.
  • Reasons and explanations.
  • Descriptions and quotes.

Example

If the main idea is “Exercise is good for your health,” supporting details might be:

  1. It can improve heart health.
  2. It helps reduce stress.
  3. It builds strength and stamina.

Easy way to spot them

Ask: “Does this sentence help explain, prove, or develop the main idea?” If yes, it is probably a supporting detail.

TL;DR: Supporting details are the specific pieces of information that hold up the main idea in writing.