Not a dumb question at all! Lots of people have been asking about it. Its really a totally photo-oriented editing program. You can import your photos, edit them, make a slideshow, print them, etc. The best part about LR for me is the ONE-CLICK option! I can't tell you how much I love it. Basically, in the "Develop" mode (aka digital darkroom, hence Develop), you can have presets that you just click and apply to your photo - that's it. All done! And the way they have the program set up, you can hover your mouse over the presets and be able to generally see how it would look, without actually applying the preset.
Another big advantage is LR will "remember" everything you've done to the photo, so its "non-destructive" editing which a lot of photogs will love. For me, I might do several different versions of a photo (B&W, sepia, color pop, etc.) depending on the LO I'm working on, so this is another great touch.
However, what LR can't do, and what PS can, is things like dodging catchlights on the eyes to make them pop, or fix blemishes, or any actions that add a lot of texture, which a lot of people like. But LR and PS are both Adobe programs, so in LR you can do all your editing, then export straight into PS from there, and finish it off (I almost always use Noiseware as a finishing touch), and then save.
Phew! Hope that helps!
