Measuring Performance of websites

Clients care deeply about web performance and they depend on us to articulate and measure how well their website is performing. If you have a service level agreement (SLA) with your client, and you should, then learning how to measure key metrics is crucial to you and your business. There are great paid products on the market that can keep track of a website's performance, but there are plenty of websites and JavaScript APIs that can help you measure these metrics free of charge.