Image SEO is important for several reasons. Not only does it play a key role in improving website traffic and SEO, but it also helps in attracting extra visitors to your website.

Images can grab attention more than text and keep people on your website longer, lowering bounce rates. This is a good sign for search engines like Google.

Having optimised images can make your website more visible in search engine results, which usually leads to more people visiting your site. It also helps your page's content to be understood better and can improve its ranking on search engine results pages.

When images are made responsive and optimized for mobile devices, they load faster and look better, which can help your website rank better and get more organic traffic.

SEO-friendly images can be understood by people with visual impairments, making your website accessible and inclusive, which allows more people to interact with your content.

Using certain structured data with images can make them appear in special places in search results (like rich and featured snippets), which can boost click-through rates and bring more organic traffic to your website."