You should make it relevant to what is going on and what would garner interest in your target market.
What is it about? This website is free promo, why not post it here?
Also beyond regular SEO rules, your website should grow organically based on how relevant it is and how many people browse it.
You can try to hack growth by spreading the word on platforms such as this, if it is relevant to the user base. I remember some guy back in 2017 getting big off paying IG influencers to peddle his products/pages. However the market is super saturated atm.
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Another thing that could help with traffic is using clubhouse there is a lot of potential traffic and strategic networking there for anyone with a blog/brand/etc. If you have an IPhone you can go on ebay and buy an invite for like 20$