Some of your products may have some variations and you probably set these products in woocommerce as variable products.
If you want to learn more about product variations, you may want to check first Woocommerce's documentation on this.
When products are setup as variations in woocommerce, you can tie each variation to an infusionsoft product.
It is important to tie woocommerce variations to an infusionsoft product so that sales will be properly tracked in the infusionsoft ecommerce reports.
In the product data section when editing a product in woocommerce, go to Infusionsoft Tab and make sure that the "Product being sold" setting is set to "Search Infusionsoft Product using SKU setting".
If you haven't added variations yet, go to Variations Tab and add / update the variations. Make sure each variations have an SKU value.
Go to infusionsoft and find the products you want to be tied up to the woocommerce variations. Edit the product and make sure it has the same SKU with the woocommerce variation. And that's it, your woocommerce variation is now tied up to the infusionsoft product.
Dynamic SKU Matching
is turned on.