“Does your site load content steadily like the tortoise, or wait until the race is almost over before it kicks into high gear, like the hare? In the race to provide the best user experience, steady is best. That’s why Google PageSpeed Insights measures your WordPress Speed Index to determine how your site content loads over time.

The Speed Index can tell you if you’re providing enough visual feedback as your site loads. It’s an important metric for understanding what your visitors are experiencing.

In this post, I’ll show you how Speed Index is calculated, how to run a WordPress Speed Index test in Chrome and tell you what you should be aiming for. Then, we’ll cover some techniques you can use to improve your Speed Index.”

Read the whole thing here.