Smile AI
Back to articles
Insights4 min read2026

Digital Performance Index

Heartburn Brands in the UK Market

The Smile AI Digital Performance Index tracks how leading brands perform across the full customer journey — and our heartburn (acid reflux) edition puts the spotlight on which OTC brands are winning online visibility, engagement, and conversion across Search, Social, Websites, and E-Commerce in the UK.

What the Digital Performance Index Measures

The Digital Performance Index (DX) evaluates up to ten leading brands within a single therapeutic indication each month. Performance is assessed across five distinct journey stages — Attention, Interest, Desire, Action, and Advocacy — giving a structured, end-to-end view of how a brand performs from first awareness through to post-purchase recommendation.

Rather than focusing on a single channel, the index captures every digital touchpoint that influences a consumer's decision-making process, making it one of the most comprehensive benchmarking tools available for OTC and healthcare brands.

The Four Digital Channels Under the Microscope

Each brand is scored across four core digital channels:

Smile Analytics

Ready to dominate the Digital Shelf?

Discover how Smile Analytics helps Consumer Healthcare brands optimize their e-commerce performance across all platforms.