Add and customize Activity Types to organize your sales activities -
Activity Type - In this section, you can view existing system generated activity types. Also, can create and customize activity types according to your requirements and even you have an option to include customize activities as "Count As Interactions".
Add New Activity Type
As you click on the "+" icon a new window will open named as "Add a New Activity Type".
Just enter the "name of activity type" and save it.