Search Engine Optimization (SEO): Maximizes search result exposure by targeting and driving Web traffic and ultimately delivering increased sales. The majority of search engine page results come from unpaid or organic search. SEO optimizes websites to ensure top search engine placement, such as Google, as only 15 percent of searchers continue beyond page one.
When you ask your friends which online video platform they use, the answer you probably hear the most is YouTube. YouTube is the largest video hosting platform, the second largest search platform after Google, and the third most visited website in the world. Every single day, people watch over five billion videos on YouTube. It’s also free to upload your videos to YouTube and optimize them for search.
Another reason is that if you're using an image as a link, the alt text for that image will be treated similarly to the anchor text of a text link. However, we don't recommend using too many images for links in your site's navigation when text links could serve the same purpose. Lastly, optimizing your image filenames and alt text makes it easier for image search projects like Google Image Search to better understand your images.