Back in the day, direct mail was one of the most popular marketing methods; well actually it was one of the only marketing methods. Technology has certainly changed since that era, but many companies will still send out leaflets, letters and brochures to reach their audience, and it can still be a very effective method.
If you have a physical store (not just an online store) then it can be important to let people from that area know what you’re all about, whilst mailing can also help you spread the word further afield. It’s a lot easier to ignore an email then it is to ignore mail, and that’s why many people still opt to use it today.
Of course lets not dismiss the fact that some people will ignore your leaflet, brochure or letter, or perhaps even tear it to pieces, but there’s a chance that the majority of people won’t and they’ll at least give it a good deal of their attention.