How to get huge organic traffic nowadays ?

Huge? define that.

You don't want HUGE traffic, you want TARGETED traffic. You generally want people who are interested in your product/service, and are ready to purchase.

Content is the best method if you're going strictly organic.

To start with, there is a world of hard dedicated work and sweat between the words "huge" and "organic".

It would be nearly impossible to answer this in one, or even 100 posts, as it's a combination of a million and a half things.

Product/service category
Time in business
Competition
Demand
Location
etc.

And these are just the basic things to start the conversation with. Techniques you may be using vary for each and every product/service.

For getting actual organic traffic you would need quality appealing content.
Also your website must be updated constantly, as it's pretty easy to get it ignored if it doesn't looks like it's an 'alive' site.

Content marketing is a good way to generate organic traffic to your website from various external webpages.

Write consistently quality and engaging content. Stay away from duplicate content.

Put work into your search engine rankings, and keep creating new content to do with new trends. Blog posts often will help especially if they are about new events.

Content Marketing can be a good option to increase organic traffic on your website easily.

Thanks everyone who suggested content marketing. This seems like a great idea. I like to write, I feel that I know a lot and have a lot to say. Why wouldn't this work for me?

Where are good places to publish? I could start my own blog but if other publications have built-in, and perhaps targeted traffic, that would be the say to go.

Start with the basic FAQ and put that directly into your website. We generated thousands of visits per month due to our extensive Knowledgebase from inside WHMCS (or Kayako). When I say extensive, we had over 1,000 "how to" steps.

Every time a customer asked a question, if we felt it would be asked again, we wrote a how-to.

My advise, put the effort into your own site directly rather than on other websites.

This is good advice. I have spent a lot of money on both FB and Google ads and neither has helped bring in a single sale to my knowledge.

I need to look closer at my marketing segment and platforms I choose to use.