Complex sentence: The jobs website also has a social networking component called "Adzuna Connect" which allows users to connect their Facebook or LinkedIn accounts to see vacancies from their first-and second-degree connections' companies and to message them to request a referral.
Split into simpler sentences: The jobs website also has a social networking component called "Adzuna Connect" which allows users to connect their Facebook or LinkedIn accounts. Once logged in, users can see vacancies from their first-and second-degree connections' companies along with the ability to message them to request a referral.