> ## Knowledge Base Index
> Fetch the complete knowledge base index at: https://support.thumbnailtest.com/sitemap.xml
> Use this file to discover available pages before exploring further.
> Pure-Markdown content can be obtained by appending a '.md' suffix to the content URLs listed in the sitemap (without the trailing slash).

# Why should you A/B test your YouTube videos?

If you aren’t A/B testing thumbnails, you’re playing a guessing game. By testing multiple thumbnails, you remove the chance that your video flops because of a bad thumbnail - you’ll always know you have the best thumbnail you could make. On top of this, you’ll get to learn more about your audience and what they like by seeing how they react to different thumbnails and titles.