In my opinion the most important part of internet marketing is to define your target audience. Then use as much sources as you can to reach it! I'm prefer to start with social media, such as fb, twitter, and instagram.
It's a must that you must target your audience that's why you need to placed it on a platform or sites that have an interesting traffic. And one best place is social media platform as no doubt there are lots of users of it nowadays.
But because it will target random people, try to find a specific social media group of what thing you will advertise so that it can target your preferred audience. E.g Crypto group in facebook, Techy group, students, cyberzone etc.