Hi Altoro, it depends.

Can you tell us which software (if any) you are using to publish your site (WordPress, HTML, etc)?

yeah man, if it's html and you're asking how to add a page, then your best bet would be to install wordpress and call it a day.

To install wordpress, go to your cpanel within your hosting account. The click on Fantastico, then from there install wordpress and you're done. From there you can add pages and posts and change the look/theme of your website with a couple of clicks.

1. For an example site ALWAYS use example.com - that's the basic rule

2a. To have something like you posted above you create a new directory on your site's server named "affoffer" and place an index.html file into it... that file should contain all the stuff that you wanted on that "page"...
2b. Make a file called affoffer.html and add it (plain English: upload via FTP just as you did with the rest of the site) to your site's root folder.
That would result in a slightly different URL > example.com/affoffer.html

Now, combine this with other things you've learned in this thread and you are good to go.

Don't listen to ignorant people that think WP is the answer for everything. Usually, they discovered it yesterday and have no clue how to use it... Just ignore them!

Its very simple.. I think you have very poor knowledge about HTML or web design.. So search HTML tutorial and learn HTML, CSS and JAVA script..... after that you can easily fix this problem...