@sudsy can probably give a better explanation. You simply use either an external URL on page, or a workflow using the “go to URL via sudsy page”. Either way, the plugin detects the URL change, the page doesn’t reload and you fire a workflow based on that (“when sudsy URL changes, do this thing…)”. In my case the fired workflow changes states. Highly effective.
I pretty much use only three pages in my app, but have several thousand url’s.
Plugin page: [UPDATED v2.2.0] 😃 Sudsy Page router for SEO-friendly clean URLs! (by Tech-Tonic)