How duolingo.com Looks on Slack
This page shows how duolingo.com appears when shared on Slack. The current preview headline reads "Learn a language for free". It pairs with the description "Learn languages by playing a game. It's 100% free, fun, and scientifically proven to work." and a social image. Overall, duolingo.com's setup scores 96/100 against Slack best practices.
Slack preview
Slack
Duolingo
Learn a language for freeLearn languages by playing a game. It's 100% free, fun, and scientifically proven to work.

Analysis
duolingo.com's social meta tag setup passes every check we run. The required tags are present, the image is well-sized, and the title and description fit comfortably within Slack's truncation limits. There's not much to improve here - this is a strong reference for anyone looking to optimize their own social previews.
What's working well: social share image found; description length is good (90 chars); twitter card type: summary. 3 of the checks we run pass cleanly.
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