I have noticed small spike in traffic for my health related product review website since January 2nd, however, nothing on such a scale ^ Does the traffic flow continue to...

I think it does but not directly. Consider how your on-page metrics impact organic rankings. If the paid traffic boosts your time on site and pages per session while lowe...

Good point. And I'm doing like this as you say.

First links you acquire for a new site are likely to be from submissions, comments, profiles pages and social networks, as I do not expect new site having great content f...

Yes, like this.

Thank you, @seoradar for your beautiful suggest.

What do you mean by profile backlinks? Backlink from your profile, like on this site https://seoforum.com/@bryangreene ?

High quality backlinks are from high quality content published on authoritative websites. If you do some remarkable work, publish superb article, even high quality source...

Can you say which backlinks i do for my website. Actually, what are the high quality backlinks?

Mentioned are mainly low quality backlinks. Won't be enough.