Discuss some design considerations that you should keep in mind when you want to design a professional-looking flyer or newsletter.

Designs on business flyers should be based on the business' theme and the message that it wants to communicate. A sale should have a design that would attract customers with the discounts they can avail with their purchases. 
Texts, colors, lines, shapes, and images are the elements that should be figured out depending on the kind of communication that a business would want to share. 
A sale flyer uses big text to emphasize discounts. Advertising products with amounts should require friendly designs with short and clear-cut messages. Colors can also drive customers and associate it with the kind of product. 

If you go to ask a question and say ask, there should be something that looks like this