CRO Manifesto
guideline #
46

Display All Categories at a Glance on Small Screens

context

If users have to scroll excessively to see all categories on mobile, they may miss options or feel overwhelmed. A cluttered or hidden menu slows decision-making.

Why?

Ensuring all categories fit within a small frame makes navigation effortless, allowing users to compare options instantly. A clear, scannable layout improves engagement and guides users toward their next step.

Content
  • Your mobile bounce rate exceeds 60% or mobile conversion rate is 40%+ lower than desktop
  • Google Analytics shows users spending less than 10 seconds on your homepage on mobile devices
  • You have 6+ main product categories that require horizontal scrolling or are buried in collapsed menus
  • Your store generates $50K+ monthly revenue with significant mobile traffic (30%+ of total sessions)
  • You're on Shopify, BigCommerce, or have developer access to modify your theme's navigation structure

Transform your mobile category display into a scannable grid that fits within the viewport without scrolling.

  1. Audit your current categories: Identify your 6-8 most important product categories. More than 8 creates cognitive overload on mobile screens.
  2. Create a mobile-first grid layout: Use a 2x4 or 3x3 grid with category tiles sized at minimum 44x44px touch targets. Allow 8-12px spacing between tiles.
  3. For Shopify implementation: Navigate to Online Store > Themes > Customize. Edit your homepage sections and add a "Custom HTML" block. Use this structure:

<div class="mobile-categories">
<div class="category-grid">
<a href="/collections/category-1" class="category-tile">
<img src="category-icon.jpg" alt="Category Name">
<span>Category Name</span>
</a>
</div>
</div>

  1. Style with CSS: Set .category-grid { display: grid; grid-template-columns: repeat(2, 1fr); gap: 12px; } for mobile viewports under 768px.
  2. Test on actual devices: Ensure all categories are visible within 375px viewport height (iPhone SE standard). Implementation typically takes 4-6 hours including testing.
  • Mobile homepage engagement: Target 15-25% increase in time on page and 20-30% reduction in bounce rate within 2-3 weeks
  • Category page clicks: Expect 10-20% increase in clicks from homepage to category pages, measured via Google Analytics Enhanced Ecommerce
  • Mobile conversion rate: Look for 5-15% improvement in mobile conversion rates within 4-6 weeks of implementation
  • Navigation completion rate: Track users who click categories vs. those who exit, aiming for 60%+ category engagement rate
  • AVOID: Using text-only category links that are too small to tap accurately (under 44px height). BEST PRACTICE: Combine icons with text labels in properly sized touch targets.
  • AVOID: Displaying 10+ categories that require scrolling to see all options. BEST PRACTICE: Limit to 6-8 primary categories with secondary categories accessible via main category pages.
  • AVOID: Using generic icons that don't clearly represent your product categories. BEST PRACTICE: Use high-contrast, recognizable icons or product photography that immediately communicates the category.
  • AVOID: Forgetting to test on actual devices with different screen sizes and orientations. BEST PRACTICE: Test on iPhone SE, standard iPhone, and Android devices in both portrait and landscape modes.
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