The Web Store Setup - Sync Options window give you the option to sync your items Manually or Automatically. If you choose to sync automatically you are then given the option to sync upon opening or closing your company file.
Click the Force Sync button if you want to sync all item information to your web store, not just the changes that were made to your items since your last sync.
To select which items to sync with your web store , go to the Item Information - Selling Details window and select the new option “I Sell This Item In My Web Store”.