Core SEO

Image SEO

Niraj Raut 2 min read Core SEO

💡 Think of it like this: Image SEO is like the table of contents in a book. It tells both readers and search engines exactly what each chapter covers before they read a single word.

Quick Facts: Image SEO
Category	On-Page SEO
Difficulty Level	Intermediate
Affects	Rankings, CTR, User Experience
Tools to Measure	Yoast SEO, Rank Math, Hemingway App, Surfer SEO
Related Terms	Image Alt Text, First Input Delay, Google Discover

How Image SEO Works

Image SEO encompasses all the optimisation techniques applied to images on a website to improve their contribution to organic search performance. Images can drive meaningful traffic through Google Image Search, and unoptimised images are one of the most common causes of slow page load speeds — which directly impacts Core Web Vitals rankings.

Why Image SEO Matters for SEO

In my Nepal SEO practice, image optimisation is a high-value quick win that I apply during every technical audit. Many websites I encounter have images that are multiple megabytes in size, served in outdated formats like JPEG and PNG instead of modern WebP or AVIF, and missing descriptive alt text entirely. If you’re unsure how Image SEO is impacting your site, working with an experienced SEO consultant can help you identify the problem and fix it efficiently.

Common Image SEO Mistakes

Image optimisation impacts SEO in three main ways. First, compressed, properly formatted images improve page load speed — a Core Web Vitals and ranking factor. Second, descriptive file names and alt text help Google understand what the image depicts, contributing to relevance signals for the parent page and image search visibility. Third, images with proper structured data (such as ImageObject schema) are eligible for rich results in Google Image Search and Discover.

Do’s and Don’ts: Image SEO

✅ Do This	❌ Don’t Do This
✅ Write a unique meta description under 155 characters for every page	❌ Duplicate meta descriptions across multiple pages
✅ Use descriptive, keyword-rich alt text on every image	❌ Leave image alt text blank or use generic filenames like ‘image001.jpg’
✅ Structure content with clear H2 and H3 headings that reflect user intent	❌ Use headings purely for styling — every heading must signal content structure

← Back to SEO Glossary

TL;DR: Image SEO is the practice of optimising images on a website — including file names,…

If you remember one thing — focus on how Image SEO affects your users first, then optimise for search engines second.

Frequently Asked Questions

What is Image SEO?

An important SEO concept that affects how search engines discover, evaluate, and rank your website

Why does Image SEO matter for SEO?

Image SEO directly influences how search engines understand and rank your pages. Websites that get this right tend to see stronger organic visibility, better crawl efficiency, and more consistent traffic growth over time.

How do I improve Image SEO on my website?

Start by auditing your current setup using tools like Google Search Console, Screaming Frog, or Ahrefs. Identify the gaps, prioritise by impact, and apply fixes methodically. Working with an experienced SEO consultant can help you cut through complexity and see results faster.

Niraj Raut

SEO Consultant & Strategist

SEO consultant helping service businesses in Nepal and beyond grow through organic search. I write about technical SEO, content strategy, and building durable search presence without the fluff.

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