PPI stands for pixels per inch or image resolution. In other words how many pixels per square inch are distributed horizontally and vertically.
Pixels per inch.
I think I know what you are asking. PowerPoint uses 96 ppi standard. So set your ppi in photoshop to 96 ppi also. That should keep them the same when you copy/paste into each other.
Pixel per Inch if you're talking about computer display. In the insurance industry ppi refers to Payment Protection Insurance. See the related links for other possibilities.
Yes, you can create animated GIF in Photoshop Elements. See related link for tutorial.
PPI
If you have missold PPI then you are entitled to make PPI claim for it. Before making PPI claim you must ensure that you are declared unable to pay installments of PPI. You should also have proper documents associated to PPI claim in order to file claim against it. It is suggested to take help of PPI claim lawyers for success of PPI claim.
Ppi Media was created in 1984.
Free Photoshop site is Photoshop online. You must create Adobe ID in order to use it. See related links.
See related link and watch detailed instruction how to create reflection in Photoshop.
You can rank your images in Photoshop Bridge, which is program for searching images on computer, adding tags, ranking and so on. Photoshop Bridge comes with Photoshop, so if you have Photoshop installed you have and Bridge. See related link.
Not usually. Photoshop is likely to be taught in graphic design and other art related courses.
Photoshop does not have liquid layout, probably you hear that term for Adobe InDesign. See related links.