Image SEO: How to Optimize Images for SEO
What is Image SEO
Image SEO refers to the element of on-page search engine optimization which primarily relates to image files. In practice, it is usually referred to as image optimization. The objectives of image SEO include improving rankings of a website in the Google Images search, as well as generally helping to increase the visibility of a website.
8 Ways on How to Optimize Images for SEO
1) Use descriptive alt text and captions
Alt text (alternative text) describes an image. You need to provide alt text for every image you add to your website. This text is one more part of the page that you can use to signal to search engines what the page is about.
2) Choose the best file type
Most images on the web are one of three file types: JPEG, PNG, and GIF.
Each of them uses a different compression method. That means file sizes between the three file types can vary dramatically and it is important to know
3) Use Responsive Images
Internet users use different screen size and resolution and images need to be able to fit to any screen size.
4) Add images to your sitemap.
Google encourages website owners to submit a sitemap to them to help them better crawl your pages and get them added to the index. They also allow you to include images in your sitemap or alternately, create a separate image sitemap to submit
5) Consider lazy loading
Lazy loading is where the browser defers the loading of images (or any other objects—video, etc.) until they need to be shown on screen. Other images are loaded as and when they need to be loaded—i.e., as you scroll.
6) Leverage browser caching
Browser caching is where images and other files get stored in your visitors’ browsers. The result is that things load faster for them if and when they visit your website in the future.
However, with browser caching, what happens is that your browser hangs on to some of these images. So when you view this page again—or a similar page—there’s no need to re-download all of them.
7) Use a CDN
Content Delivery Networks (CDNs) solve this problem by caching your files across a global network of servers. Now, when someone visits your website, the images will be loaded from the server closest to them.
There are lots of CDNs out there. Here are just a few of them: