Who is solely responsible for web performance?

Third-party is content that not your domain serves to the users. It is content that you don’t control, and it is not your server that delivers the content to the user.

Examples of third-parties:

  • Analytics
  • Advertising
  • Tag Managers
  • JavaScript from CDNs
  • Social sharing buttons
  • Video player embeds
  • Chat services
  • A/B testing scripts for experiments
  • Performance measurements

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