Ask HN: What are the best resources for Internet marketing? Posted by bryk on Thursday March 29, 2018 @11:45AM from the ask-hn dept. ( 4 comments | 17 points | on HN )
Not a direct answer. Its usually for SEO. But, I would recommend Backlinko [0]. SEO can be a factor in Internet marketing. So I would recommend that.
Other than that, it depends on what product you're trying to market.
If its a blog, then you can post on HN, Reddit, your niche related subreddits, etc...
If its a product, then HN, Reddit, Product Hunt, Indie Hackers, some news outlets like The Next Web, LifeHacker, etc...
[0]: https://backlinko.com
I also learn a lot from reading posts or listening to the podcasts on indiehackers.org