To add expertises to your profile, please follow the below mentioned steps.

Using the App:

1) Login to the App
2) Tap on "Profile"
3) Tap on "Edit" icon
4) Tap on "Expertises"
5) Tap on "Add new +"
6) Pick your expertises
7) Tap on "Next"
8) Describe your expertises
9) Tap on "Finish"

Using the Web:

1) Login to Ovvio
2) Go to "My Giver Profile" by clicking on your display picture
3) Click on "Edit Profile"
4) Click on "Add Expertise +"
5) Pick your expertises