How many posts do you guys usually have?

Typically how many posts do you guys create before advertising a new site? or is it all just a matter of preference and strategy? does it matter at all? I also didn't know where to put this post

I don't think this matters at all in most cases. What kind of advertising are you doing? If you are doing paid ads, sure you want to have more content because users should be visiting multiple pages every time they hit your site. If it is free advertising methods, like social media, just get it out there immediately.