Time for action—deleting pre-installed store data

In this section, we will delete all the old sample store data that we will not need for our new store.

We browse to the OpenCart administration panel and make a login using the username and password we have created upon installation. The administration panel is available at http://yourwebsite.com/store/admin.
Let's click on the Catalog | Categories menu.
Let's choose all category items by using the checkbox on the top-left of the screen and then delete all categories.
As a result, we have deleted all categories, as shown in the following screenshot:
The next step is to browse a Catalog | Products menu.
We select all the products on the page by using the checkbox on the top-left of the screen and clicking the Delete button.
Do not forget to repeat this process for the second page to delete all products.