Few-shot Prompting
Few-shot prompting gives the model a handful of example input-output pairs in the prompt to show it exactly what you want.
Analogy
Like showing a new hire two or three completed samples before asking them to do the next one.
Why it matters
Adding a few examples sharply improves accuracy and formatting consistency for tricky extraction or classification steps.
In practice
Showing three messages already labeled Sales/Support/Spam, then asking the model to label a fourth.