Specialty is the field that your particular expertise falls under, when categorized in broader terms. This could be more than one field, depending on the interdisciplinary nature of your work, in change in focus.
Your specialty helps you connect with your colleagues with the same expertise.
To add your specialty:
1) Click on your name on Loop's homepage
2) Click on the Bio button on your profile window
3) On the bottom right corner of the Bio page, click button next to Specialty
4) Select your Domain, Field and Specialty from respective drop down menu and Save
To edit your specialty:
1) Click the pencil icon next to Domain.
1) Follow step 3/4 above to update your specialty.