Do you have loads of products which all need adding to one or more categories quickly in WooCommcerce for WordPress?
Go to the products page, search the current category and products you want to select.
Then click select all top left.
Then once highlighted select edit all.
Once there select the category you need to add them too and click save.
Remember when you select all if there is more than one page of products the select all only works for the current page of products you are on so you will need to apply the same action to page 2 and so on.