I must support page viwer.

I think visits are more important than the page views. As more the visits means your site is getting more traffic.

both are important.but page visit increases the traffic.

I think conversions are the most important, while what will I do with 1,000,000 visitors if no one buys my service?

Both are important, which is why Google emphasizes them over unique visitors. The visit number indicates the loyalty and frequency that your audience shows your site. And if you have ads on your site, such as Google AdSense, page views are important for building ad inventory and therefore revenue.

Pages per visit is useful for understanding the quality of your Web site. Higher pages per visit means people are clicking on more pages before bailing out. Higher pages per visit also means more ad inventory and revenue.

I think page views are important because page views express the quality of your content.

Yes. I agree with this.

Gathering all the stats are important IF you know how to analyze them....
You may be able to determine which pages work and which ones need work...

However, if you have a money site the paypal stats tell the story..(or the checks)

the visitors number i smore important

Pageview according to OpenTracker

A pageview is each time a visitor views a page on your website, regardless of how many hits are generated. Pages are comprised of files. Every image in a page is a separate file. When a visitor looks at a page (a pageview), they may see numerous images, graphics, pictures etc. and generate multiple hits.

Visit according to OpenTracker

A visit happens when someone or something (robot) visits your site. It consists of one or more page views/ hits. One visitor can make multiple visits to your site.