How does syncing work?

On Pro and Business, Shopify tells Granite about every change, and the note is updated within seconds. On Free, and for every plan once a day, Granite reads the whole store again and fixes anything that was missed; pages and blog posts are read every 6 hours. A note is only written when something changed, so syncing does not fill your version history. To read everything again now, open Catalog in the app and choose Re-sync all.