SEO may generate an adequate return on investment. However, search engines are not paid for organic search traffic, their algorithms change, and there are no guarantees of continued referrals. Due to this lack of guarantees and certainty, a business that relies heavily on search engine traffic can suffer major losses if the search engines stop sending visitors. Search engines can change their algorithms, impacting a website's placement, possibly resulting in a serious loss of traffic. According to Google's CEO, Eric Schmidt, in 2010, Google made over 500 algorithm changes – almost 1.5 per day. It is considered wise business practice for website operators to liberate themselves from dependence on search engine traffic. In addition to accessibility in terms of web crawlers (addressed above), user web accessibility has become increasingly important for SEO.
Did you know that organic engagement is highest on Facebook when posts contain videos? Or that simply including the word “video” in your e-mail’s subject line can increase open rates by 19 percent? One company went as far as to test whether video thumbnails in an e-mail newsletter would increase engagement and they found that it was quite successful. They reported that nearly 41 percent more people engaged with the e-mail if it had a video thumbnail, as opposed to a static image or just text.