robinrick Definitely too early to judge, you only got the guide less than 24 hours ago. I am sure the guide doesn't say that you should judge your ad's effectiveness over a period of less than 24 hours. I also seem to remember it says use a daily budget of $5 to start and wait maybe 3 days (can't be sure of timescale) then scale up if it's working.
Other factors will also come into play, such as your ad photo, description, call to action, whether your product is in demand, whether you've hit the right audience, whether you've got the right time of day, whether you're delivering to the right device, age group, whether your offer is compelling or not,
By the way, nothing to do with the number of visitors, but what apps have you got installed? There are certain apps that will help you with increasing sales and some are free or have a free trial period. MailChimp comes to mind, it's not only an email marketing app, check out its features. I have these installed if you're interested: Conversio, Currency Converter Plus, Improved Contact Form, MailChimp, Oberlo, Returns Center by AfterShipp and Tracking & Delivery Updates by Aftership..