Navigate to Woocommerce > Settings > Payments tab. [Check Screenshot-2,3]
Click on SSLCommerz to edit the settings. If you do not see SSLCommerz in the list at the top of the screen make sure you have activated the plugin in the WordPress Plugin Manager.
Enable the Payment Method, give a proper title and description to show on the checkout page, fill up stroe id and store passowrd fields carefully, select success and fail/cancel page.
You can enable or disable Hosted/Popup mode from Hosted EasyCheckout
Setup is complete. Check if everything is working properly.