To edit product details,

1. Go to the Magento Admin Panel.
2. On the left navigation bar, click on Catalog and then on Products.
   
3. The Products page appears as shown below:
   
4. All the products will be listed here.
5. Now to edit any product detail, click on the selected product and edit the required detail and click on the Save button.
   
6. You can also edit the details of the product in bulk.