In efforts to further provide search engine optimization (SEO) options for clients - we've enabled a feature allowing you to control the alt-text on all thumbnail images used on your real estate blogs.
What is alt-text?
When Google crawls your website to give it a ranking, their algorithym reads your content to determine it's purpose, relevance, and context.
When you add images to that content, there is no way for them to know what that image is and how it relates to your content - hence 'alt text'.
This is a single line of code where you can tell Google with words, exactly what that image is. Thus helping Google in crawling your website and providing a better ranking.