2. The content quality is very important, but the production quality is not that important. Production quality and technical aspects have to be OK but not world class. Better production quality is correlated with more trust, but it can’t make up for the lack of substance. So, Facebook Live videos, webinar recordings, and other video material with good enough production quality will work as long as the content itself is engaging.
SEO is also about making your search engine result relevant to the user's search query so more people click the result when it is shown in search. In this process, snippets of text and meta data are optimized to ensure your snippet of information is appealing in the context of the search query to obtain a high CTR (click through rate) from search results.
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.