The Opportunity Requirements sub-tab is for designating Skills, Roles and Industry Codes that may be required by the target Companies and Contacts.
To Add Requirements for an Opportunity:
1.Open the Requirements sub-tab of an Opportunity.
2.Click the Add New Requirements icon, 
.
3.Select one of these options:
•New Skill(s)
•New Role Experience
•New Industry Experience
4.Select value(s) from the drop down list.
5.Repeat steps 3 and 4 as needed.
6.Click the Save Changes icon, 
.