What’s the Best Image Size for SEO?

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When it comes to images, size does matter – at least when it comes to search engine optimization (SEO). Bigger images generally perform better than smaller ones, which means you should consider your web page design and how you display images while optimizing your content so that each image performs as well as possible in the search engines’ eyes. Keep reading to find out what the best image size for SEO is and how to optimize your images to rank higher in the search engines.

Why bother with image SEO?
Images play a huge role in search engine optimization and search results. According to Search Engine Land, 20% of queries are associated with images and when Google updates its algorithm, it doesn’t just rely on text anymore—it also looks at images! With that in mind, it’s crucial that you choose the right image size before uploading it to your website. If you don’t, you could be hurting your chances of ranking higher. Here are some tips to help.

Do smaller images really have an advantage over larger ones?
Let’s get one thing out of the way before we start: yes, size matters in terms of page-loading speed and how quickly your website appears to load. It’s a widely held belief that smaller images result in quicker load times, which Google has confirmed. So why is it that many companies still opt to use large image sizes on their site and actually report slower load times as a result? A good example of such a company is AutoTrader UK, whose homepage features a huge image that weighs in at more than 100kb. As you can see from our case study below, they had serious loading issues due to larger images and needed to rework their design in order to fix them.

Does this mean we have to resize all our existing images?
Depending on how many images you have, it’s unlikely you’ll want to go through your old images and resize each one. Resizing an image by hand is a time-consuming process, especially if you have a lot of them. Thankfully, there are some simple automated tools that will help automate the resizing process. Pixresizer offers a quick and easy solution that allows you to upload all your images at once then drag and drop them onto your new image sizes. You can even save them into folders with corresponding names to keep everything organized.

Is there a limit on the number of words you can use in an alt tag?
A tag is a keyword label that you can place in HTML code to describe an image. The alt attribute serves as a text alternative to images that may not be seen by users who have turned off images. The alt attribute should describe the content of your image and briefly give search engines information about what is shown in your image. If you’re using your own images, you can put extra information in your alt tag but generally they should contain 250 words or less. Using a too-lengthy description can result in errors during our automated processing; if something seems off or broken, it’s worth taking a closer look at what might be going on before taking any manual action against your site.

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