Image SEO Services

Image SEO Services address one of the most consistently overlooked sources of organic traffic and one of the most common causes of unnecessarily slow websites. Every image on a page is simultaneously a load-time variable, an accessibility requirement, a ranking signal, and a potential traffic source through Google Image Search. Most businesses get all four of these dimensions wrong by default. Core Creations' image optimisation work corrects them systematically across your entire site.

Why Images Have an Outsized Impact on SEO Performance

Images are typically the largest assets on any given web page. On a site that has not been specifically optimised, images account for 50–80% of total page weight — the primary reason pages load slowly on mobile connections. Google has used page speed as a ranking factor since 2010 for desktop and since 2018 for mobile, and its Core Web Vitals framework makes Largest Contentful Paint (LCP) — which is most often an image — a direct ranking signal. An unoptimised hero image is therefore not just an aesthetic choice; it is a ranking liability that can suppress every page it appears on.

Beyond page speed, images are an independent content type that Google indexes and ranks. Google Image Search drives significant traffic across categories including products, recipes, home design, travel, health, and fashion — and images also appear in universal search results, enriching standard listings with visual content that increases click-through rates. A well-optimised image on a well-structured page can rank in both text search and image search simultaneously, doubling its organic visibility contribution. This is why image SEO is a meaningful part of our broader SEO strategy rather than a standalone technical chore.

Image File Optimisation

File optimisation covers three distinct but related variables: format, compression, and dimensions. Each has specific best practices that most content management systems do not enforce by default.

• File format selection: JPEG remains suitable for photographic images where fine colour gradients are present. PNG is appropriate for images with transparency or solid graphic elements. WebP — now supported by all major browsers — typically reduces file size by 25–35% compared to JPEG at equivalent visual quality. AVIF, the next-generation format, reduces file size further still. We audit your site's image formats and implement conversion where format choice is costing load performance.
• Compression settings: Most image editing workflows and CMS uploads apply either no compression or overly aggressive compression that degrades visual quality. There is a middle ground — typically 70–85% quality for JPEGs — that reduces file size substantially without producing artefacts visible to a normal viewer. We calibrate compression settings appropriately for each image category on your site.
• Responsive images and srcset: A 2400-pixel-wide image served to a mobile screen that will display it at 400 pixels wide is 6× larger than it needs to be. Responsive image implementation — using the HTML srcset attribute to serve appropriately sized images to each device — eliminates this waste. We implement responsive images across your page templates so that every device receives the correctly sized file for its screen.
• Lazy loading: Images below the fold do not need to load until the user scrolls toward them. Implementing native browser lazy loading defers the download of off-screen images, improving initial page load time without affecting the user's experience of the content.

These technical improvements directly address Core Web Vitals scores, particularly LCP and Total Blocking Time, and can produce measurable ranking improvements within weeks of implementation — especially on image-heavy pages like product catalogues, portfolios, and editorial content.

ALT Tags and Image Descriptions

ALT attributes serve two critical functions simultaneously: they describe an image to screen readers used by visually impaired users (an accessibility and legal requirement under Australian web accessibility guidelines), and they tell Google what an image depicts when its visual content cannot be directly understood. An image without an ALT attribute is invisible to both screen readers and search engine crawlers. An image with a generic ALT attribute — "image1.jpg," "photo," "logo" — provides no useful signal to either.

Effective ALT text is specific, descriptive, and contextually appropriate. It describes what is actually in the image, includes relevant keywords where they are a natural fit (not forced), and is calibrated to the length of the content it is describing — typically 50–125 characters. We audit every image on your site and write ALT text that satisfies both accessibility standards and search engine requirements.

• Decorative images: Images that are purely decorative and add no informational content should receive an empty ALT attribute (alt=""), which signals to screen readers to ignore them. Applying descriptive ALT text to decorative images creates noise for screen reader users and dilutes the signal value of ALT text on genuinely informative images.
• Product images: For e-commerce sites, ALT text on product images should include the product name, key attributes (colour, material, model number where relevant), and brand. This directly supports ranking in product-specific image searches. Our e-commerce SEO services incorporate image optimisation as a standard component of product page work.
• File naming: Image file names are an additional, minor ranking signal. "dsc_00471.jpg" tells Google nothing. "core-creations-sydney-office-branding-2026.jpg" provides topical and geographic context. We rename image files to descriptive, hyphenated strings as part of the optimisation process.

Image Sitemap Submissions

Google discovers images through two pathways: crawling the HTML of pages it has already indexed, and reading image-specific sitemap entries. Images that are loaded dynamically via JavaScript, served through a content delivery network, or embedded in a way that Google's crawler does not readily parse may never be indexed if an image sitemap is not present.

An image sitemap extends your standard XML sitemap with image-specific tags: the image URL, a caption, a title, the geographic location depicted (where relevant), and the licence under which the image is published. Google can use all of these fields to classify and rank images more accurately. We create and submit image sitemaps through Google Search Console and verify that images are being indexed correctly, fixing any URL configuration or access control issues that prevent discovery.

For sites that serve images through a CDN, additional configuration is sometimes needed to ensure that the CDN URLs are either included in the sitemap or canonicalised to the expected domain. We handle this as part of the sitemap implementation work, in coordination with the broader technical SEO programme.

Structured Data for Images

Several schema.org types include image properties that influence how Google displays your content in search results. Product schema with an associated image can trigger rich results that include a visual thumbnail directly in the standard search listing. Recipe schema with a high-quality featured image consistently earns rich snippets in recipe search results. Article and BlogPosting schema with a correctly specified image property increases the likelihood of your content appearing in Google Discover, which serves content to logged-in Google users based on their interests.

We implement and test the appropriate structured data for each page type on your site, ensuring that image references within that schema point to correctly sized, correctly hosted images that meet Google's rich result requirements. Image dimensions for structured data have specific minimum requirements — 1200 pixels wide for Article schema, for instance — and images that fall below these thresholds are silently excluded from rich result eligibility.

Image Optimisation for E-commerce and Content-Heavy Sites

Sites with large image libraries — online stores, news publications, portfolios, and hospitality businesses — face image SEO challenges at scale that differ from those facing a standard brochure website. When hundreds or thousands of product images, editorial photos, or portfolio pieces are involved, manual optimisation is not feasible. We implement systematic solutions: bulk compression pipelines, automated WebP conversion on upload, programmatic ALT text generation from product database fields, and templated image naming conventions that produce descriptive file names without manual intervention.

These systematic approaches ensure that new content published through your CMS is correctly optimised from the moment it goes live, rather than accumulating as a backlog of unoptimised assets that will eventually need to be addressed. Our web design team can configure these pipelines as part of a site build or rebuild, ensuring the optimisation infrastructure is built into your publishing workflow from the outset.

Measuring Image SEO Impact

Google Search Console's Performance report includes an Image search type filter that shows you exactly how much traffic your images are currently generating through Google Image Search. For most unoptimised sites, this figure is close to zero. After optimisation, it can become a meaningful additional traffic channel — particularly for product-oriented businesses and content publishers with strong visual assets.

Beyond Search Console, Core Web Vitals improvements attributable to image optimisation are measurable through Google's PageSpeed Insights tool and Chrome User Experience Report data, which reflects real-world performance for real visitors. We track these metrics as part of our SEO reporting, so you can see clearly whether image optimisation work is translating into faster pages and improved Core Web Vitals scores.

Image optimisation is one of the highest-return, lowest-disruption improvements available to most websites — it improves rankings, reduces bounce rates, enhances accessibility, and generates a new traffic channel, all from a focused technical audit and implementation cycle. Get a fixed quote to find out how much performance your current images are leaving on the table.