Here are the steps to integrate Searchanise-
Go to your shopify store.
Go to Apps.
Open Searchanise app (Smart search & Instant search)
4. Copy the API key.
5. Open PlobalApps dashboard.
6. Go to Customize.
7. Go to Integrations.
8. Add API key in the search page section.
9. Click on SAVE.
10. Click on Go Live.
Note: Searchanise integration only includes the product search functionality viz the Full-Text Search.
Hope this article was helpful :)