Which booster type should I choose: product page, cart page, or top bar? (Essential Free Shipping Upsell app)

The app has three booster types:

• Product page: appears below the Add to Cart button.
• Cart page: appears on the cart page and in supported cart drawers. Requires the Essential plan or higher.
• Announcement: a bar shown at the top or bottom of the page.

For an announcement, choose the position under Design → Positioning: Top of the page or Bottom of the page. The top bar can be sticky, and the bottom bar stays fixed.

For product page and cart page boosters, use Placement → Custom position if you want to place the booster yourself. You can reposition the booster's app block in the theme editor, or paste the booster code snippet into your theme. Both use the Booster ID shown on the Placement tab.