PDF2Go is quite an interesting PDF compressor in that a lot of the features are deliberately overlapped with each other to make it convenient for a user to get to their goal in different ways. It does have some very useful tools for creating forms and so on, but no other advanced capabilities can be used to compare it to Acrobat and other PDF editors in that class. If you look at the online version, you'll see much of the same functionality but a highly simplified version of it. Other features of PDFescape include editing, annotations, creating digital signatures, and so on. For physical prints, a lower compression level is recommended.

The highest compression level is usually suitable for bulky documents with lots of text and images but also where the images are only meant for online viewing rather than for physical prints.

The software lets you choose compression level so you can control the output size by deciding to prioritize size over quality and vice versa. It still has that 'basic-ish' feel about it because it lacks advanced tools like OCR, but as for all other tasks, PDFescape is as good as the rest of the bunch.

The desktop avatar of this hugely famous online PDF tool is equally capable.

Pdf file size reducer online