Layout shifts can be caused by the following events:

• Changes to the position of a DOM element
• Changes to the dimensions of a DOM element
• Insertion or removal of a DOM element
• Animations that trigger layout

Provide videos with a supercharged focus on visual performance. This custom element renders just like the real thing but approximately 224× faster.

The first step in improving speed is establishing who is responsible for the effort. Other than responsibility, it’s invaluable to gather a diverse group who can contribute unique ideas to the brainstorming and evaluation session (more on that below). By including people from different business areas, you’ll allow knowledge to spread throughout the organisation more freely too.