After getting 1.1K upvotes and before being removed, a post I made on Reddit brought over 5,000 people to my website @popvend within 18 hours. It brought in 150 signups (Traffic wasn't fully our target audience) and lots of great feedback that I plan to implement.
One thing that you have to do when posting on Reddit is provide value. As most know, going in and pasting your link will have your post removed 9 times out of 10. Even after making this post and providing (what I thought) was some helpful advice, it still got removed!
So why do I think my Reddit post drive that much traffic? Well for one, it was in a fairly large subreddit r/learnprogramming. I also posted content that I knew would relate to the majority of people in the sub, since I was one of them, this came a lot easier. It was also a more motivating style post, by showing what I had achieved since a year ago when I was in the same position as most of them were now, it not only brought value, but also some inspiration to keep learning.
Another thing that I did was took the time to answer all of the questions and comments people left. This showed that I actually cared to help out, and wasn't just there to spam my site.
While these are simple tips, I believe that all of this combined with a thoughtful, relatable, and valuable write up greatly increases your odds of having a successful post. Not only on Reddit, but other places as well.