When you are developing an ad, there are probably a number of things that are going through your head at any point. For example, you might be trying to think of who your target demographic is, and what it is that they might be interested in. You would also want to represent the product that you are trying to advertise as accurately as possible so that people would get an accurate representation of what it is that they are buying but at the same time make the product look good so that any flaws that it might actually have would not be more apparent than they need to be.
One thing that you most likely haven’t thought about is closed captioning. The fact of the matter is that closed captioning can completely change the game in the ad industry. There is a whole group of people that ads aren’t targeting until and unless they are closed captions. At the end of the day, the purpose of an ad is to reach a large group of people, so why wouldn’t you add something that would open said ad up to a large group that would have not been able to properly appreciate it otherwise?
If you want to read up some more on why closed captioning is so important to a wide variety of fields, it is highly recommended that you check out this Beverly Boy article. It can put a lot of things into perspective and also help create a better understanding of how these closed captions can be implemented. Since advertising can be a tricky field to navigate, it might do you some good to do a little bit of research beforehand.