What's Lossy Compression Mean?

In information technology, lossy compression or irreversible compression is the class of data encoding methods that uses inexact approximations and partial data discarding to represent the content. These techniques are used to reduce data size for storing, handling, and transmitting content.

What do you mean by lossy compression?

Lossy compression is a method of data compression in which the size of the file is reduced by eliminating data in the file. In doing so, image quality is sacrificed to decrease file size. Any data that the compression algorithm deems expendable is removed from the image, thereby reducing its size.

Is lossy compression good?

One of the biggest obvious benefits to using lossy compression is that it results in a significantly reduced file size (smaller than lossless compression method), but it also means there is quality loss. ... But you can also see the image degrade in quality as you apply higher ratios of compression.