Stamping in Blender is a rendering option. A stamp on a render can prevent that render from being lost, keeping your project organized, and keeping your files organized.
The 3D View is where you perform most of the object modeling and scene creation. Blender has a wide array of tools and options to support you in efficiently working with your mouse, keyboard and keypad. Your flat (two-dimensional) monitor is your viewport into the 3D space.
We know that around the world, our users have PC's of widely varying power. Rendering is the process in CG that can chew up CPU and disk space like no tomorrow. Especially in corporate environments, it is easy to fill up terabyte servers by uploading ten hour-long DV tapes and doing some editing. So, there are lots of options try to shoehorn a big job into a small PC by providing you with multiple sets of options that chunk up the work as best we can, while still preserving image integrity.
This page discusses the main options found on the Render panel, and subsequent pages give you more.
This panel provides many options for rendering, increasing and optimizing your render and output speed, and the location for displaying and saving your render output. The options on this panel control where and how the results of a render are handled.
There are many image formats out there for many different uses. A format stores an image in a lossless or lossy format; with lossy formats you suffer some image degradation but save disk space because the image is saved using fewer bytes. Let's learn more about it...shall we?