how product stored when added to cart

Hello i am creating mobile app for arastta but not able to understand how to store added product in customer table a:3:{s:96:"YToyOntzOjEwOiJwcm9kdWN0X2lkIjtpOjQ3O3M6Njoib3B0aW9uIjthOjE6e2k6MjI1O3M6MTA6IjIwMTUtMDUtMTgiO319";i:1; s:40:"YToxOnt...