When to use a comma after "for instance":
* When it introduces an example:
- "There are many ways to improve your writing, for instance, using strong verbs and vivid imagery."
* When it's used as an interrupter:
- "We should focus on the bigger picture, for instance, the overall impact of this project, rather than just the details."
When NOT to use a comma after "for instance":
* When it's part of a phrase that's essential to the meaning of the sentence:
- "The information provided for instance, the date and time of the meeting, is crucial."
Key takeaway: Think about the role of "for instance" in the sentence. If it's introducing an example or interrupting the flow, use a comma. If it's part of a phrase that's essential to the meaning, don't use a comma.