There are many factors to consider when it comes to optimizing an e-commerce store. Details like navigation, thorough product reviews, website security, competitive prices and free shipping are essential if you’re going to stand out, particularly if you sell electronics online – or similar products.

However, ecommerce images matter too; here’s why.

According to Moz’s State of the Searcher Report, Google Images held a 26 percent search share compared to Google.com’s 59 percent. Moz also found that image blocks appeared in just under 11 percent of search results and that those images earn three percent of all Google search clicks. The numbers might not jump out as important, but they’re pretty suggestive of image importance in SEO.

Let’s look at some criteria to keep in mind when adding images to your e-commerce store.

Only Use High-Quality Images

Shoppers are likely to be turned off or distrusting of your brand when they see pixelated or grainy images. According to BrightRiver, a good rule of thumb is to follow Google Shopping and Amazon image guidelines. Google Shopping requires product images to fill 85 percent of the photo and to be at least 800 pixels to be suitable for high-resolution displays. Amazon requires products to fill 85 percent of the frame, with a minimum product height of 500 pixels on a white background.

Make Sure They Load Quickly

Having beautiful, high-quality images is great, but if they’re not properly compressed, they’ll take a while to load, which hurts user experience and could result in the loss of a sale or a visitor.

Depending upon how your e-store is setup, you have different options available for compressing images. If you host your own e-store, you can choose from a variety of image compression tools to aid your efforts. If your store is on a hosted platform, image compression is already baked in. Properly compressed images index in Google Image searches more readily.

SEO Optimize Your Images

To properly optimize product images, focus on descriptive file names and alt image text.

Image file names should briefly and accurately describe the photo. For example, if you sell electronics online and want to optimize a particular stereo receiver product page, instead of saving the image as “IMG-30538.jpg” — name the file what it actually contains. If you’re selling the Yamaha R-S202 stereo receiver, then save the file:

“Yamaha-R-S202-Bluetooth-Stereo-Receiver.jpg” Don’t overcomplicate image titles. Briefly describe the photo and you’ll be fine.

Alt image text or alt attributes should go into a bit more detail, since it’s what will display if a user’s browser doesn’t properly render the image. Alt text will also display if a user hovers over the photo. Proper alt image text can improve your product page’s search engine rankings and give you the best chance of being indexed in image search results.

But be careful to avoid going overboard. Stuffing keywords or writing unnatural language won’t help. Keep the language simple, add a relevant keyword (again, as long as it’s natural) and if you have multiple products that are very similar, be sure to include the specific model or serial numbers to keep things clear to search engines and users.

Make Your Photos Engaging

You’ll improve your conversion rates by adding photos of people wearing or using the product. If you sell apparel, it might even make sense to use models of varying skin tones and complexions to help shoppers of all types imagine how the clothing will look on them.

If you’re lucky enough to have power users that love your stuff, leverage them for user-generated photos. Set up a system for them to submit photos sporting your gear or using your product. Doing so improves your product images and functions as a marketing campaign, helping to stir a buzz around your products and the people who love them.

When you fill your e-commerce store with crisp images that load quickly, are SEO optimized and engaging, you’ll have a better chance of being found through image search. You will also improve conversions among shoppers navigating to your site through other means.