Optimizing your images’ “title” and “alt” will not only give your website better ranking in the search engines, but it is very important for text based browsers, accessibility, etc.
WordPress has a plugin for almost anything and for this particular purpose we recommend SEO Friendly Images. This plugin automatically optimizes all of your images, including the existing ones, taking the title and description from the post.
For more details on how to install plugins onto your WordPress, please check this article HERE.
