Core Web Vitals & Speed Optimization Case Study

In this project, I optimized the website’s technical SEO and performance to improve loading speed, Core Web Vitals, and overall user experience. The goal was to create a fast, stable, and search-engine-friendly website structure.

SEO Case Study By SEO Expert Tanvir Hushan

Project Overview

Step 1: Performance Analysis

  • Audited the website using performance testing tools.

  • Identified loading speed issues, render-blocking elements, and layout shift risks.

Goal: Detect technical problems affecting speed and UX.

Step 2: Core Web Vitals Optimization

Improved key performance metrics:

  • First Contentful Paint (FCP)

  • Largest Contentful Paint (LCP)

  • Cumulative Layout Shift (CLS)

  • Total Blocking Time (TBT)

Goal: Meet Google’s Core Web Vitals standards.

Step 3: Page Speed Optimization

Applied technical improvements such as:

  • Image size optimization

  • Lazy loading setup

  • Script & CSS optimization

  • Reduced unnecessary code load

Goal: Faster page load and smoother experience.

Step 4: Mobile Performance Focus

  • Ensured mobile-first optimization

  • Improved mobile speed and responsiveness

Goal: Better performance for mobile users (Google’s primary index).

Step 5: Technical SEO Enhancements

  • Improved site structure stability

  • Reduced layout shifting

  • Enhanced accessibility & best practice signals

Goal: Stronger technical SEO foundation.

Final Result (Very Strong Part)

  • Performance Score: 100

  • Accessibility: 91

  • Best Practices: 100

  • SEO Score: 77

  • LCP: 1.3s

  • CLS: 0.007

  • Total Blocking Time: 0 ms

The site achieved excellent performance metrics, creating a fast, stable, and user-friendly experience aligned with Google’s ranking signals.

Challenges

Identifying the Key Problems

Low Conversation Rate

Visitors were not taking action due to weak structure and unclear messaging.

Lack of Trust Signals

Missing credibility elements reduced user confidence and decision-making.

Poor Mobile Experience

Layout and speed issues affected usability on smaller devices.

Solutions

Strategy & Implementation

Growth Icons

Improved Call-To-Actions

Placed clear and strategic CTAs to guide users toward action.
Trusts Icons

Added Trust Elements

Included proof, clarity, and structured content to build confidence.
Solutions Icons

Mobile Optimization

Enhanced responsiveness, readability, and performance across devices.

Results

Measuring the Success

Higher Conversion Rate

Better structure helped turn visitors into real leads.

Improved Engagement

Users stayed longer and interacted more with the content.

Faster Page Speed

Optimizations improved loading time and overall experience.

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