Thank you for raising this question!
After completing the WooCommerce integration, Omnisend starts syncing all historical data from your store, including contacts, products, and orders. The initial synchronization can take up to a few hours, but it should be fully completed within 24 hours.
Moving forward, your store’s data will sync to Omnisend instantly.
By default, we sync email addresses provided at checkout to Omnisend with a non-subscribed status. However, you have the option to add an email opt-in checkbox at checkout through the Omnisend Plugin. To do this, simply enable the ‘Add an opt-in checkbox to the checkout page’ option in the plugin settings. You can customize the opt-in consent text and even preselect the checkbox by ticking the ‘Preselect opt-in checkbox in the checkout page’ option.
Once set up, any customers who check this box during checkout will be synced to Omnisend as email subscribers. Please note that the opt-in feature applies to the email channel only, while phone numbers will continue to sync with a non-subscribed status.
For detailed instructions on integrating WooCommerce with Omnisend and more information about the integration process, you can check out the following article: https://support.omnisend.com/en/articles/1636174-omnisend-for-woocommerce-wordpress
If you have any further questions or need additional clarification, feel free to let us know – we’re happy to help!