> ## 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).

# How do you know which thumbnail/title is best?

We suggest judging Thumbnails/Titles based on CTR * AVD (Click Through Rate multiplied by Average View Duration) but you can select a column to base a winner on. We use this stat based off of recent research from the discord/twitter thumbnail communities that has shown this to be the most reliable metric of video success.