We know that repeating keywords in one page is spam and Google calls it keyword stuffing.

But, if we repeat some content in all pages of a website to help users, is it keyword stuffing too?

For example we have 200 unique words in each page and about 200 other words to describe how to download and how to buy and what other services you may get from this website and etc ...

Or if we repeat some keyword in title of all pages like this :

Download PDF : Article One.

Download PDF : Article two.

Download PDF : Article Three.

...

Is repeating "**Download PDF : Article**" in titles, spam or keyword stuff ?

If not, Is it a positive point to get more visitor from Google ?