Custom audience allows advertisements to be created to appeal to that given audience. Those features offered that appeal to the custom audience can be emphasized, drawing greater attention and interest in the process;
Remarketing list can be better used. It would be possible to take advantage of Facebook exchange to have advertisements retargeted for the right column and also the newsfeed. This will of course take into consideration the content of the site itself
All of this seems very wonderful, but there is a cautionary note that an account executive needs to keep in mind. The use of Custom Audience must be cost-effective as far as numbers are concerned. In other words, a very small custom audience doesn’t do much good at all, and barely justifies the time and effort. The larger the custom audience, the better it will be. A rule of thumb is to have a population size somewhere in the thousands. It creates a very large group of people seeing advertisements. It also allows for or valuable analysis of resulting data.