Even if you understand basic marketing, it's difficult to get a gauge on what works in MA, because most MA schools simply parrot what they saw done at their instructor's place, in sort of a shotgun approach to marketing.
Days of the "shotgun marketing approach" and flyers are long gone. Those are no longer effective means of advertising unless you have a captive audience like a school full of kids or another group of people, say a church group with younger members, or older depending on the type of martial arts being advertised.
These days when people want to look for something, they do a "google search" or the search engine of their choice. Before the Internet, flyers on cars was a good way to try to get some local attention, but the marketing changed once the Internet became a reliable source of "Where can I find...."
When I took Business classes there were no topics or discussions on how important websites are. When I took marketing classes, there were no topics about online marketing or keywords, or social media. The only reason I know and understand these things is because I design webpages and do SEO analysis. I know all of the tricks in things that make online marketing work. It used to be easier, but now it's a lot of work. If Online Marketing, SEO Analysis, Keyword Analysis, Social media are strange things in terms of business, then I highly recommend learning how those things works. Also learn the impact of how they affect businesses. I would also recommend learning how to do these things even on the lower levels just so you don't get ripped off by people who sale these services.
So it's difficult to find out what really makes the difference between successful and unsuccessful schools.
Mods Feel free to delete this post if needed. I'm not trying to promote the school or diss it. I'm just showing the Marketing Effort
Find a successful school that grows fast enough to open up additional schools. Take a look at their websites. What are they talking about? What are they selling? How much are they selling it for? What type of events do they do? Are they teaching the same martial arts that you do? Are they "stealing" students interested in what you teach?
For example, there was a Choe's Hapkido School that was advertising that they did kung fu. They had it on their website and they had a video of kids in a park swinging around weapons. To me it looked like neglect. Coming from Chinese system that uses weapon, there is no way we would let kids just swing swords and spears around. To me it was clear that they didn't train in the weapons they were swinging around. So my teacher then called the school and confront them about their honest. The reason I bring this up is because things like that can take a person who wants to learn Kung Fu and get them into a Hapkido Class thinking that's what they are learning. There are schools out there who will do this.
My point is, if you don't market what you do , them someone else will fill that gap for you and it won't always be from a school that trains the same system you do. I also bring up Choes Hapkido because they do put a lot of effort in Marketing and I can't hate on them for that. If I hate it, then I need to up my own marketing efforts.
If you look at their kid's martial arts youtube channel Choes Hapkido Duluth Ga. You will see that they have separate youtube channels for adults and children and the kids stuff has a lot of testimony and a lot of demos. They aren't shy to tell the world about what they do.
In short, "They cast a lot of nets, so they catch a lot of fish." They probably pay a lot for their marketing too. I probably wouldn't recommend too much of that as there are easy ways to do marketing these days and to get big results without spending big money. But it's not possible to get good results without spending any money.
I personally wouldn't waste the money to print flyers, unless I lived in a small town and it had a shop that people like to visit. Or unless I could get the flyer in the school system handed out to all the kids. grades 1-12. But with Covid around. That probably won't attract as many as it used to.