If you want to hide some certain products from search, here is how you can do it.
Find the product you’d like to hide in the Bigcommerce admin panel, go to its settings, add the SEARCHANISE_IGNORE keyword in the Search Keywords input field, and save the changes. The changes will be indexed within about 10 minutes and the product will not be shown in Searchanise widgets anymore.
Don’t worry, the Search Keywords field won’t be visible on the storefront, it’s only used for search.
What's more, the products hidden from search this way will be excluded from your catalog product count that Searchanise uses to pick a suitable pricing plan for your store.