Analog vs. Digital

What is the difference between analog and digital? What are the benefits of digital?

analog is the oldest technology methods as oldest phones, Dvd's, televisions movies sets, etc. and it uses continuous electrical signals. Which digital is the advanced technology methods like the apple products, smartphones, laptops, with the difference of how those transmitted the data information and use of signal, like the Wifi is an example of digital. However digital not only have such benefits it also have been helped on the world of the technology the past years, increasing and development news.