When I am building a Rails app that I expect to be public facing in some sort of capacity, I don’t want to be displaying auto-incrementing, integer based IDs in my URLs. Not only does it visually look better, in my opinion. It is a security enhancement by removing the predictability of record discovery via the URL.

https://hackernoon.com/how-to-use-hash-ids-in-your-url-in-ruby-on-rails-5-e8b7cdd31733