With difficulty! For my hacking simulator Botnet of Ares [0] I am mostly using my log + MailerLite newsletter to keep people engaged. I've had some success sharing on Reddit as well, but it's hard to get traction without breaking the subreddit rules. Twitter hasn't been that good for me so far.

Generally sharing the project around the internet has been pretty decent for SEO, and my links are now ranking fairly high when people are specifically searching for the game, which is nice.

[0] https://store.steampowered.com/app/3627290/Botnet_of_Ares/