Now Searchanise supports
metafields not just for products, but for product variants too. For example, you can add the product code, or manufacturer part number to ensure that customers get relevant results when searching by these attributes. To enable search by product variant metafiled, follow
these instructions. Also, you can
add filters based on product variant metafields, so that the customers could filter down the product list and quickly find what they need. Check out this
help article to set up the new filter.
Last but not least, you can
display product variant metafiled values in search results. Here's
how to do it.