A permalink is a permanent link (URL) that remains unchanged for many years. It should be clean and easy to remember.
For example, let's look at a checkout page created using WooFunnels.
Click on "View"
This is the page that'll appear:
As you can see, the highlighted portion is the URL of the page with "checkout-page" as the permalink of the checkout page.
Under the general settings, you can change the permalinks of the sales page, opt-in pages, opt-in confirmation page, checkout page, upsell, and thank you pages.
We recommend you put clear and short permalink for your pages.
Once you're done, click on "Save Settings". This will save all your permalinks here.