Choose a project
At the beginning of a sprint, whoever facilitates your retrospectives simply picks the project your team is working on.
Throughout the sprint, team members make suggestions for what they team should start doing, stop doing, and keep doing.
During the retrospective meeting, your facilitator has the team discuss the suggestions and check which ones the team decides require action items.
Capture in tickets
After the retro, all items that were checked during the meeting are automatically captured as JIRA tickets so that nothing slips through the cracks.