In the Lightning Salesforce User Interface, just add the component to the page (see setup).
Select one or more of the Checklists, which are applicable to the record. The more specific Checklists are at the top, the general ones at the bottom.
After selecting a checklist, a popup window opens. Select the items you want to add as Tasks:
Select, Review and Update Task information before saving.
View the tasks for the record:
Click on the Tasks button and review current tasks and status.
View Tasks in Activity Timeline and summary status.
In addition to adding Tasks manually, you can also add Tasks automatically based on criteria.