Where will I put the code you provided on my site

Hello, anybody from the administrators? Where should I put this code on my site? Should I write in the head code? Where?

<a href="https://www.sparktraffic.com/?ref=1027093">Traffic Bot</a>

You should put the link on all the pages. Make it a normal link, not in Head.

I don’t know how to put it on all pages. Is there a sample video or narration with pictures?

You need to ask your site administrator or a developer about it.
We are sorry but we just sell website traffic here.

If I do this on all pages, how many organic hits will come to the site per day?

You cannot have Organic traffic in the free Nano projects, only in paid ones.