To edit multiple products with the same features (e.g., the same price, tag, etc.), go to the Configuration - Products menu and select the products you want to edit (using the checkbox on the left side of the product)
After selecting the products you want to edit, click on the "Bulk Editing" button.
A modal window will open where you can make the following changes:
Change price - the price you will add here will apply to all the selected products
Change Category - move the products to a category you select here
Change VAT - change the VAT for the selected products
Change Tag - add a tag or modify the tags of the selected products
Add to existing tags - this option allows you to add a new tag to your selected products and keep the existing tags