There are privacy issues concerning how the data collected by mobile devices is used and whether or not companies have the right to collect such data without explicit consent. Such data can be used for identity theft or to send spam if it falls into the wrong hands due to data theft or poor security of the information. Also, the tracking of individual's locations and movements may be considered crossing the line by some.
Internet usage around the world, especially in the wealthiest countries, has steadily risen over the past decade and it shows no signs of slowing. According to a report by the Internet trend investment firm Kleiner Perkins Caulfield & Byers, 245 million people in the United States were online as of 2011, and 15 million people connected for the first time that year. As Internet usage grows, online commerce grows with it. This means that more people are using the Internet with each passing year, and enough of them are spending money online to impact the economy in significant ways. (See also E-Commerce Marketing)
As you begin creating videos, you’ll notice a key difference between scripts and your typical business blog post — the language. Video language should be relaxed, clear, and conversational. Avoid using complex sentence structures and eloquent clauses. Instead, connect with your audience by writing in first person and using visual language. Keep the language concise, but avoid jargon and buzzwords.
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.