What are the criteria for the uniqueness of a page?

It is most important that the content has not been seen, read, or offer somewhere else because this will be your own trend in the field.

1.page title should be short and concise (unless you want it's broken at the end)
2.each page title should be unique and the unique part should go first (if a visitor keeps several tabs from the same open, he should clearly see what each tab is about)
3.page title should be focused (don't try to include all your keywords in the title the home page);

Simple criteria for the uniqueness of a page are:
- Content is the King. Unique and Fresh Content Good for Website.
- Use High Density Long tail Keyword.
- Create Unique Image.
- Not a Grammar and Spelling mistake.