$29.99/month: How Ignoring Website Performance Costs Agencies Clients and Revenue
https://technivorz.com/everyone-chooses-on-promo-rates-why-litespeed-outperformed-apache-for-a-high-traffic-wordpress-site/
Which questions will I answer and why do they matter to agencies managing 5-50 sites? Short answer: you should focus on the questions that directly affect client retention, time spent on firefighting, and recurring revenue