Advertising platform

[Danielsmith12]

I am an SEO and building a website with a plan to expand it globally as soon as possible. The site will be ready for official begin within utmost 20 days. I was looking for best publicity platform but I don't have more money to pay out on advertising. So please tell me where can I advertise the website to generate enormous traffic at reasonable rates. But if there are the platforms which can generate a lot of traffic but price high, you can recommend those also.