Nobody likes a slow website, so regularly testing your site speed should be something you do at regular points to identify anything slowing you down. A fast site is a good user experience, and a satisfying UX leads to higher conversions. Additionally, Google now say that speed is a ranking factor.
This week I discovered a really useful feature within the free tool, WebPageTest, called Visual Comparison. It allows you to enter multiple URLs to compete against each other comparing load times visually. Not only is it useful for monitoring your own site but you can see how you compare against your competitors. We can also choose to set the test to run at 3G, 4G or desktop speeds.
The video output is a really powerful for conveying impact and something you can share easily across your team.