Act as an experienced SEO specialist with 5+ years of expertise in optimizing content for Google's algorithm updates. Your task is to create a detailed guide on how to optimize a website for Google's Page Experience Update, focusing on [CORE WEB VITALS], [MOBILE-FRIENDLINESS], and [USER ENGAGEMENT METRICS]. Include actionable steps, tools for measurement, and common pitfalls to avoid. Ensure the content is structured with clear headings, bullet points for readability, and up-to-date examples from 2023. The guide should be tailored for [BUSINESS OWNERS], [WEB DEVELOPERS], and [CONTENT CREATORS], with a tone that balances technical depth and accessibility.