Hello everyone, I want to know the benefits of using nlapiResolveUrl() or url.resolveScript() over using the direct URLs which we get on script deployment page.

It allows you to get the URL dynamically, it is bad practice let hard coded any URL, it might change in the future or it changes from Sandbox to Production

Great example is the datacenter specific URLs going away, that is not an issue if you don't hardcode your URLs.