How Fonts Can Affect Your Message
With direct mail, if you plan to design the piece yourself, using the wrong font will definitely detract of the attractiveness of your mailer. Using child like fonts can ruin a mailer. When you offer your business as professional and experienced, using a font that does that reflect that will discourage your customer from working with your company. When you direct mail to your customers to encourage them to try out your company's promotions, you want to the reflection of your professionalism to impress your customer. You want them to look at your mailer and say "Wow, this company knows what they're doing." Many times, advertisements have a lot of good information but if it is presented in the wrong way or using the wrong text, it makes the company seem less credible.
When you use fonts that are childlike, it makes your mailer look less qualified and the ends up looking playful. When you want to promote something that is of great importance, you don't want to present it to your recipient in the wrong way with the wrong font. As you advertise, it is best to use fonts that will be universally accepted as professional fonts.
Sans-serif fonts make your advertisement or promotion easier to read and follow while serif fonts can be a bit fancier. It all depends on what kind of mailer and message you want to present. You want to make your mailer interesting with your use of fonts but not detract from your message. Using a font that is too light or whimsical will make your mailer distracting. If you want to present something that is more serious, you want your text and font to reflect that so that your customer knows exactly what you are offering.
The most important part of any mailer is still the message and the offers presented within that make it a great mailer and advertisement. But with the right font, it can boost it to be a spectacular mailer!