Step 1: To get the link to the Sign-up Page, from the Admin Dashboard click on "Configure Sign Up Page".
Step 2: On the following page, click the link "View Sign Up Page".
Step 3: You get the Sign-Up Page where you can copy the link from the Address Bar at the top.
Step 4: Log in to your Shopify store. Go to Online store and then click select navigation
Step 6: Go to "Navigation" and click the "Footer Menu" link.
Step 7: Select "+Add Menu Item" from the "Footer Menu" section.
Step 8: Next, name the Page a name like "Affiliate Program," paste the link to the affiliate sign-up page, and click "Add."
Step 9:Click "Save" at the top or "Save Menu" at the bottom after adding the Footer Menu.
Step 10: Reload your site to see the new menu added to the footer, which will take you to the Sign Up Page.