To add or delete columns to the product go to Catalog ➤ Products, and you will redirect to the “Products” page.
You can add new columns from the “Columns” section to the “product” page. You configure the columns of the “Product” page as per your requirements.
You just have to select or deselect the columns and the changes will instantly reflect on the page.
You can also reset the columns as it was previously by clicking the “Reset” button.