Used when doing one thing while also doing another; 'while', 'and at the same time'.
Long explanation:
The Noun かたがた grammar point is used when doing one thing while also doing another. The first action is the main purpose and the second action is often a casual task or a task carried out alongside the main task. This grammar point emphasizes doing two things concurrently. The translation could be 'while', or 'and at the same time' in English.