Hello,
I just wanted to know that if someone has more 5000 products then how will they be available to use this app in Shopify please let me know it would be really helpful.
The standard Shopify search and filter has some limitation as you may have experienced. To overcome it, you may want to use an app like this https://apps.shopify.com/ultimate-search-and-filter-1. It does not have a limit on the number of products and tags.