What is the difference between page speed and site speed?

Page speed refers to how quickly a specific page loads and becomes interactive, while site speed refers to the overall performance across all pages on a website. Page speed is measured for individual URLs, while site speed is an aggregate measure. Both matter—users care about the specific page they're on (page speed), but also form impressions based on overall site performance (site speed). Search engines consider both when ranking sites. Improving site speed often requires systematic changes across all pages, while page speed improvements can be page-specific. Example: A site might have fast homepage (good page speed) but slow product pages (poor site speed), requiring different optimization strategies for each.