It takes multiple screen shots and It stitches them together. For huge pages it can capture WYSIWYG (What You See Is What You Get). Definitely helpful and useful because many sites purposefully jumble a print so the print is nothing like the viewed web pages. Like lots of reviewers say you get used to the functionality of the free version but as time goes on functions you like now require payment. Oh well...somebody has to do the coding because I surely do not know how to do write code. I like that they let me use it on several computers for one price. That way I can use it in my home wherever I am and I don't have to climb up and down stairs to get to a one and only computer with the FireShot Pro extension. It will take the stitched image and break it into pieces so it can be saved as a pdf. That's helpful and useful also and works pretty good most of the time. Then it will do a kind of OCR on the image. The OCR isn't always accurate but it's pretty good most of the time. FireShot is like making bread...yeah...I can do it myself manually but it would take a lot of time...so I buy bread...and I buy FireShot.