This is a companion post to Cumulative Layout Shift in Practice, which goes over what Cumulative Layout Shift (CLS) is, how it can be measured in lab (synthetic) and real-world (RUM) environments, and why it matters.

This is a companion post to Cumulative Layout Shift in Practice, which goes over what Cumulative Layout Shift (CLS) is, how it can be measured in lab (synthetic) and real-world (RUM) environments, and why it matters.