Merchants often install an app for a problem a theme section could solve. That is how monthly fees and scripts pile up.

Quick answer

Choose a Shopify section for storefront UI you can edit in Customize. Choose an app when you need hosted data, accounts or platform logic. Browse the sections catalog before you add another subscription.

Shopify theme section compared with an app install
Theme files stay in your theme. Apps bring another runtime.
JobPrefer
Announcement bar, trust badges, size tableSection / block
Reviews, subscriptions, searchApp
Unique buying flowCustom development

Next: product page sections, buy Shopify sections in India.