Using calendar you will get daily, weekly, or monthly view of task timelines.
Also, you will get drag and drop feature. You can use universal search in calendar.
You can search tasks by task status, task priority, project title, task title,task users.
You can open task by clicking on event in calendar.
Also, If you want to create task you can just click on date and create task form will get open.

To use calendar on frontend you can use shortcode wppm_tasks_calendar

Calendar add-on is integrated with buddypress integration add-on of Taskbuilder. Only tasks created in buddpress group will see in calendar on frontend.