How alltrails.com Looks on Slack
This page shows how alltrails.com appears when shared on Slack. The current preview headline reads "AllTrails: Trail Guides & Maps for Hiking, Camping, and Running | AllTrails". It pairs with the description "Explore the outdoors with AllTrails, the best app for hiking, biking, and running. Discover curated guides, trail map..." and a social image. Overall, alltrails.com's setup scores 73/100 against Slack best practices.
Slack preview
Slack
AllTrails.com
AllTrails: Trail Guides & Maps for Hiking, Camping, and Running | AllTrailsExplore the outdoors with AllTrails, the best app for hiking, biking, and running. Discover curated guides, trail maps, photos, and reviews for over 500,000 trails worldwide.

Analysis
alltrails.com's social setup currently has 2 warnings that affect how it renders on Slack. The most impactful fixes are listed below - they range from missing required tags to image dimensions that will be cropped or rejected by specific platforms.
In particular: title is 75 characters - truncated on most platforms; description is 174 characters - truncated on most platforms. Each of these has a one-line fix in the recommendations panel above.
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