Checklists represent a data collection tool that can be attached to jobs for your team to complete during appointments. Checklists help with workflow and quality standardization, especially when multiple team members are assigned to the same job.
You can fully manage Checklists and create Checklist Templates on the Web App, but on the Mobile App you can easily assign a Checklist from your templates list, and let the team take over.
See this video on how Checklists work on the Mobile App.