A/B testing (split testing) compares two versions of a page or element to see which better achieves a defined outcome. Landing page optimization applies CRO (conversion rate optimization) principles so traffic from SEO, ads, and email converts.

A/B testing process

  1. Hypothesis: “Changing the CTA from ‘Submit’ to ‘Get a free quote’ will increase form key events because intent is clearer.”
  2. One primary change: Test headline or CTA or hero image — not everything at once if you need clear learning.
  3. Split traffic: Send comparable users to A (control) and B (variant).
  4. Run long enough: Avoid calling winners after one quiet afternoon; need adequate sample size.
  5. Decide with a metric: Key event rate, not “which looked nicer.”

Statistical caution (exam + practice)

  • Premature stopping creates false winners.
  • Seasonality matters in Nepal (Dashain/Tihar traffic ≠ normal weeks).
  • Mobile vs desktop mixes can hide effects — check device splits in GA4.
  • Low-traffic SME sites may need sequential tests or qualitative tools (Clarity) before formal A/B platforms.

Landing page CRO checklist

  • Message match: Headline mirrors the ad/keyword promise.
  • One primary CTA: Call, WhatsApp, or form — not five competing buttons.
  • Proof: Reviews, licenses, photos of real location/team.
  • Speed & mobile: Fast on 4G; thumb-friendly buttons.
  • Friction cuts: Fewer form fields; show trust near the submit button.
  • Track the CTA: GA4 events for form submit, tel: clicks, WhatsApp clicks.

Nepal practice: Many ad clicks fail because the landing page asks for long forms when users expect a call or WhatsApp chat. Test a short form vs click-to-WhatsApp CTA and measure inquiry volume and sales-qualified rate.

Case study: Form vs WhatsApp CTA

A mortgage broker tested long application form vs “Chat on WhatsApp for eligibility.” Chat variant produced more conversations; form variant produced fewer but higher-documentation leads. They kept both paths: WhatsApp for speed, form for serious applicants — scored separately in the CRM.

Learn more: conversion optimization services in Nepal.