Many business owners publish articles diligently but forget that image SEO also affects where they rank on Google. Yet the product photos, infographics and illustrations on your website can bring in new visitors you have been missing out on. The good news is that improving image SEO does not take expert-level technical skills, just small habits applied consistently.
The numbers are persuasive. Around 15.1% of Google search results pages show images, and Google Lens now handles more than 20 billion visual searches every month (Omnibound, 2026). Visual search has moved well beyond a fringe trend. If search engines cannot read the visuals on your website, you are missing an opportunity that is right in front of you.
Why image SEO matters for businesses in 2026
Search engines do not “see” images the way people do. They read the context: the file name, alt text, surrounding text and even the page structure. This is where image SEO acts as a translator between your visuals and Google's algorithm. The clearer the context, the better the chance your images appear in Google Images and in the visual blocks within standard search results.
There is a second, equally important reason: speed. According to the HTTP Archive Web Almanac (2025), images account for around 48% of the median page weight, and an image is the Largest Contentful Paint (LCP) element on around 76% of mobile pages. In other words, the quality of your on-page techniques depends heavily on how you handle visuals. Tidy image optimisation improves the user experience and your Core Web Vitals scores at the same time.
More than aesthetics
Images are often treated as decoration. With the right image SEO approach, though, a single product photo can bring clicks from people who never typed your brand name. For local businesses, the effect multiplies, because visuals often appear alongside local SEO results on Google Maps.
7 practical steps to optimise your images for SEO
1. Give files descriptive names
Rename IMG_20260811.jpg to minimalist-teak-wood-chair.jpg. This simple step is the foundation of image SEO, because the file name is the first signal Google's crawler reads. Use lower case, separate words with hyphens and avoid random numbers.
2. Write alt text for people
Alt text is meant for screen readers, but it also helps search engines understand what an image shows. Write a natural sentence describing what is visible rather than a pile of keywords. Healthy image SEO only includes a keyword when it genuinely relates to the photo. This also makes your website more accessible.
3. Use modern formats such as WebP and AVIF
Data from the State of Web Vitals (2026) shows that 49.6% of LCP images are still JPEGs, while only 26.6% are WebP and 6.1% AVIF. In other words, most websites are not yet using lighter formats. Switching to WebP can cut file sizes by 25–34% with no noticeable loss of quality, an easy win for your image SEO strategy.
4. Compress before you upload
Next, compress every image before it goes into your media library. Aim for under 150 KB for ordinary photos and under 300 KB for large banners. The lighter the page, the faster it loads, a factor we have long discussed in the context of building an efficient business website from the start.
5. Set dimensions and use lazy loading
Include width and height attributes so the layout does not “jump” as images load. Then enable loading="lazy" for images below the fold, but never apply it to the main image at the top of the page. Together, these make image SEO and performance work hand in hand.
6. Include images in your sitemap and add schema
Make sure your XML sitemap includes image entries so Google finds them faster. For product or recipe pages, add schema markup with the image property. Structured data gives your image SEO work a chance to appear as rich results in the SERPs.
7. Place images in the right text context
Google reads the paragraphs around an image. So place each image directly below the subheading that discusses it, then add a short caption. This image SEO practice is often overlooked, yet it has a real effect on relevance.
Mistakes that are still common
First, uploading a 4000-pixel photo for an 800-pixel-wide column. Second, using identical alt text on every image. Third, hiding important text inside images, where search engines cannot read it. Fourth, using generic stock photos that hundreds of other sites also use: your visuals lose their uniqueness, and you lose the image SEO advantage you should have gained.
A fifth, rather costly mistake is ignoring mobile. Google indexes pages based on their mobile version (mobile-first indexing). So if your mobile layout is a mess, your chances of appearing in visual search automatically shrink.
A quick checklist for WordPress and Next.js websites
If your website runs on WordPress, most of the work can be handled with a WebP conversion plugin and the built-in media size settings. Turn off image sizes your theme never uses, because piles of unused files only weigh down the server. Then enable a CDN so images are served from the location nearest each visitor. These three steps usually fix half the image SEO problems on small business (UMKM) sites.
For websites built on Next.js, use the next/image component, which handles responsive sizes, modern formats and lazy loading automatically. Set the sizes property correctly so mobile devices do not download the heavy desktop version. Add priority to just one main image at the top of the page.
Finally, get into the habit of a quarterly review. Make a simple list of your most important pages, then check them one by one: file name, alt text, format, size and position in the text. A light routine like this keeps image quality consistent as you add new content.
Measuring results and next steps
Track performance in Google Search Console, especially the performance report filtered by the “Image” search type. Compare impressions and clicks before and after optimisation. Changes usually show within 4–8 weeks. To speed up audits, you can use AI tools for SEO that can scan hundreds of images at once.
If the to-do list turns out to be long, you do not have to tackle it all yourself. The Webzoo team regularly handles technical audits, content structure improvements and speed optimisation for businesses in Bekasi and Greater Jakarta (Jabodetabek). The consultation is free, and you will know exactly which changes will have the most impact.
In short, image SEO is small work with results that build up over time. Start with your ten busiest pages, tidy up their file names, alt text and formats, then carry on step by step. Within a few months, you should see image SEO quietly bringing in new visitors, without spending a single extra rupiah on ads.
