Think about it this way…
you have a front / landing page
an about us page
and a contact us… that’s 3 pages.
Most websites that have more than 1 product…
have a generic product list page that displays a list of products
within a search criteria. (that’s 4 pages now)
Here is Staples page for “coffee”. Everything on this page is about their coffee product. (this would be like Page 4 mentioned above)
Staples also has a generic product detail page.
You get to this page by clicking on a product (from probably the product list page)
Here’s their product detail page for a specific “desk”
this is “page 5”
http://www.staples.com/Ameriwood-Tiverton-Executive-Desk-Expert-Plum/product_718416
and here’s another product detail page for a “faucet”
http://www.staples.com/Elements-of-Design-Classic-5-8-Comp-Angle-Stop-with-Lever-Handles-Polished-Brass/product_WYF078276293087
notice that page look exactly like the “desk” detail page - except the content / data on the page is different. This is also “page 5”… but with different data.
Because the “2 page 5’s” are different… search engines will index them as 2 different pages.
The content here is the important part. “Not the page”. (this is not to be confused with the URL)
Here’s another way to think about it… your About Us Page. A search engine doesn’t know its an “About Us” page. The content of that page… tells the search engines… its “About Us”.
And the “faucet page” mentioned above ?
tells the search engines… that specific page is about a faucet… specifically - this one
“Elements of Design Classic 5/8 Comp Angle Stop with Lever Handles; Polished Brass”
and even though the page styling may alike… it is not the same product as this faucet
which using the above examples… would also be “page 5”