As much interactive content as you can. Engagement is key in Twitter/X so if you have a specific niche try to share the news and trends regarding it daily as well as surveys and funny memes (Funny content has the best chance to get viral and will drive higher exposure to your profile).
If you don't have a clear plan of what to share, test out different types of posts and see what sticks with your current audience.
But be aware it will evolve over time. As everything does.
Share what your building, about what your product solves, features, etc.
We have a Discord community with over a half dozen contributors sharing content in it, so we built a bot that auto posts that content on Twitter and @mentions the contributor.