Sourced from: http://fitsmallbusiness.com/direct-mail/
Good packaging and offering after sales services give an upper hand as the customer becomes loyal. Having a network of people can also help in business growth. When people see billboards they gain trust in whatever service or product you are offering.
Most of us believe that these days, digital marketing is the only way to get results.
Sourced from: https://www.liveplan.com/blog/2015/06/10-effective-offline-marketing-ideas-for-startups-in-2015/