Once your photos have been added to Picasa, they are organized into albums that will appear in folders with the same names from which they were taken. Then, you can reorganize and move photos from one location to another by simply dragging and dropping. Picasa also lets you add tags to your pictures so that you can sort them easily, including adding the location in which the photos were taken, or the people in the photo, so that you can easily find them.
Picasa isn't specialist editing software, but it does provide an interesting array of features that you can use to perform basic edits, either image by image, side by side or in batches, including cropping, straightening, adjusting color and contrast, enhancing sharpness, red eye correction, and applying filters.
Other features are built in to Picasa so that you can use your photos to create posters, montages, screensavers and even movies. It can all be viewed through the external Picasa viewer and can be shared with others in multiple ways, including in the Picasa web platform, your Google+ account, Blogger, and email. Finally, Picasa also includes some very useful options to detect duplicate and empty albums, geo-tag photos, save, and compress your photos.