Data compress means reducing the size of the data so that you get to save space or make its transmission less time consuming. Usually your data in question is compressed .However at times even the entire transmission block gets compressed. This compression is done by various ways. They are a) makes the data free of any unnecessary space b) substitution of smaller bit string in place of characters that appear frequently, c) insertion of simple repeat character instead of the entire string of repeated characters and so on. By compressing a file in PDF compression, the size of a file can even be reduced to 50% of its original size.
How will PDF compression help your cause?
Talking about PDF compression, by compression of data we generally mean image compression. The compression need not always mean permanent loss of information.. They can be lossless too, which is to say that no information is lost in the process, they remain intact. PDF compression by the usage of RunLenth Compression or what is more popularly known as Flate helps to shrink your data. This technology is freely used in many spheres
A closer look at PDF compression-
The previous mentioned tasks are accomplished by PDF by using few compression algorithms. They are- LZW, i.e. Lempel-Ziv-Welch; Flate compression, CCITT groups 3 and 4 compression, RLE compression, Zip. These are algorithms which doesnt free the content of its original data after the compression. But as a matter of fact lossy algorithms which rids the compressed data of its originally contained information, achieves a higher compression ratio. Such lossy compressors can be used in cases of audio or image files. However, it is recommended that they should not be used incase of text