WooCommerce Multisite Search
The WooCommerce Multisite Search implements a missing key functionality within WordPress MultiSite environment when using WooCommerce. A good Search engine is a must-have feature for every network of shops, product exposure is a crucial aspect, imagine that a customer who can’t find a relevant title translates to a missing purchase. The implementation is very flexible and does not require specific maintenance. It will integrate with any theme search layout or customized.
Works with any existing WooCommerce shop.
Any WordPress theme which includes support for WooCommerce, incorporates a search input area where the customers search the shop. If already visible, there are no additional steps to take, the code activation makes the search become available for interrogation for all shops in the network. The results become cross-site accessible from that point.
If a WordPress theme does not support WooCommerce out of the box, the global search integration is still easy to achieve through the default WooCommerce widget called Product Search This can be found within Appearance > Widgets. The code will know how to interact with the widget to return products from all shops when doing a search.

WooCommerce Product Search widget
How the WooCommerce Multisite Search works
The search results interface is the same as the theme default, it just includes the data from all shops in the network accordingly to the search criteria

Sample Search Results page
The search interface pagination and filters are still working accordingly. The code will know how to produce the appropriate queries to order the results per defined filter e.g. relevance, popularity, rating, price etc

Search results Filtering
Optimized for performance
The search code is optimized for performance. So it will not require special hardware to run. The database interrogation is performed through MySQL queries to ensure the fastest response possible. WordPress custom queries still perform as usual. So additional parameters can pass through the search query as taxonomies or/and meta, without breaking the global search.
Enhanced mode is available for the global search, by checking also the specified mete fields.
The WooCommerce Multisite Search functionality is available for the Developer package.