App homepage displays demo in every environment there software is available

Summari nails the “show, don’t tell” rule by using looping GIF demos instead of long feature lists. Each GIF shows their app working on desktop, mobile, and Slack in just seconds—all paired with a clear call-to-action button.

Why this design works

• The motion instantly explains how the product works without a single line of text.
• Each GIF ends with a CTA, so you know exactly what to do next.
• Consistent visuals drive home the brand message: quick, simple, everywhere.
• Reduces cognitive load—people “get it” in three seconds or less.

Real-world examples

• Loom demos its video tools directly on the homepage with embedded GIFs.
• Dropbox used animation to visually teach “file syncing” years before most competitors.
• Notion’s homepage shows interaction clips instead of feature bullet points.