A session can be defined as a method of storing variables and making them available on multiple pages on a website. It helps build customized applications and may also help establishing online presence of your website. Even sessions helps preserve data across subsequent accesses. To customize module as per your requirement, you need to get, set and unset custom session variable in Magento 2. After getting registered, it stores? the customers? first name, last name and session id. In order to store the additional information, then you have to get and set custom session variable in Magento 2. Method to Get Set and Unset Custom Session Variable in Magento 2 You need to use the code in your block file. Set and get session from template file. Unset session variable. You can easily fetch all the details from customer session, checkout session, backend or newsletter. That?s it!