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Optimizely Knowledge Base

Studying for the Optimizely X Performance Foundations Exam

This Study Guide is intended to help you prepare for the Optimizely X Performance Foundations certification. This guide is broken out into important content areas that you will need to know for the exam. Within each content area, you will find a list of key concepts and links to relevant Knowledge Base articles. 

If you are preparing for the Optimizely X Performance Foundations Certification, then this guide is for you. Regardless of your prior training and experience, this document will help you learn and/or review concepts required for the exam. It is designed to help you pass your exam. Please contact if you have any questions or would like to provide feedback.

This study guide is made to be taken in the suggested sequence, but feel free to jump around if you already feel comfortable with certain topics. Good luck!


Core Concepts

Key concepts:

  • Snippet
  • Caching
  • CDN
  • How to make performant modifications to your snippet


Key concepts:

  • Client-side vs server side testing
  • Tools


Key concepts:

  • Time to First Paint
  • Metrics 
  1. CDN Load Balancing
  2. Optimize your Performance Whitepaper
  3. The Most Misleading Measure of Response Time
  4. Custom Snippets on Optimizely
  5. Best Practices for improving page speed
  6. Google Ranking Factors