Salesforce Activities : Difference between Task and Event

Activities in Salesforce are of two types Task and Event.

Task are basically used to log an activity like call, reminders, emails while Events are used scheduling meetings etc.

1. Tasks : A task is an activity not schedule for any date and time. You can specify a due date for a task or there may not be any particular date or time that task need to be completed

examples: 

 - making a phone call

 - opening a email

think of task like a check box whose value can only either be true or false.

2. Event : An event is an calendar event scheduled for a specific day and time

examples :

 - meeting, 

 - conference call

event carry a aspect of duration of time