What does a synced block do in Squarespace?

Squarespace blocks are the various types of content you use within Squarespace pages and collections, such as text, bullets, videos, images, galleries and third-party embeds. Synced Blocks are blocks that exist in multiple locations. When you update the Sync block, all its instances across your Squarespace site reflect that update.

Enable Synced blocks on Squarespace with Synced Blocks plugin from Beyondspace