Spending money makes things easier to do and easier to fail at. Ads targeted at customers is the simplest way.
The ideal thing to do is become your customer, hang out with them, learn from them. Shape your product around them. They will tell you what they will buy for how much.
Only a few products are so innovate that everyone understands what it is and the value it brings and they demand it and only you can give it to them : think ChatGPT. Those products market themselves once word gets out. Is that your product? If not you have to tell people or show people.
The ideal thing to do is become your customer, hang out with them, learn from them. Shape your product around them. They will tell you what they will buy for how much.
Only a few products are so innovate that everyone understands what it is and the value it brings and they demand it and only you can give it to them : think ChatGPT. Those products market themselves once word gets out. Is that your product? If not you have to tell people or show people.