Rather than looking at the obvious data, like bounce-rate and overall conversion rate, what specific data should I be looking at to help improve earnings on a site or seeing where money is being lost?
If you want to move past basic bounce rate, here are a couple suggestions that might help:
heat maps of where the customer is 'looking':
https://capturly.com/
A/B testing to simultaneously test several variations of your website to see which is doing best:
https://www.optimizely.com/
Not sure if you're yet measuring on a fine grained level on your site (i.e. which buttons people click on within your site), but popcornmetrics offers an easy, non-dev way to set that up.
https://www.popcornmetrics.com/
if you want advice specific to your site feel free to send a message,
best,
Lee