I like to recommend installing the free demo version right before acquiring and check the need for session management. The OC Session Manager module is mostly intended for OpenCart 3. Opencart stores some person data (language, currency, cart, etc.) in PHP sessions. OpenCart can store this information in two approaches: https://pendenteturmalinanegra06229.laowaiblog.com/31019899/the-5-second-trick-for-opencart-limited