Developers use Google's PageSpeed Test to get a website to run faster and smoother. It identifies problems that potentially slow the site down on both mobile devices and desktops. In most cases, it will also give tips on how to fix any issues it finds.
Identifying issues and optimizing your site continues to grow in importance as websites become more dynamic. Content can vary between visits and visitors at any point in time, and it is constantly changing, depending on who visits the site.
A lot of the content websites deliver is driven by a database. As databases grow, more code and content add to a site. Over time this can become damaged, create conflicts, depreciate, or not play nicely with other databases and scripts running on your site.
There are many tools available that can help pinpoint the cause of the conflict and some of them include: