Activities in Salesforce are your events, your tasks, calls you’ve made, and emails you’ve sent. Salesforce gives you multiple ways to track your activities together for a more complete picture of your progress on deals and accounts.
Track Activities Together in Lightning Experience Always know what to do next on each deal that you’re working on, and see at a glance what’s already happened. Track events, tasks, calls, and emails—collectively called activities—on the Home page, on the Kanban Board, in the activity timeline, and in reports.
Track Activities Together in Salesforce Classic You can track events, tasks, calls, and emails—collectively called activities—in lists, calendars, and reports. Track all activities on an account to get a complete picture of the preparation, follow-up, and other planned and completed work associated with the account. Activities share many fields, such as subject, contact name, and related record.