Child themes are add-ons to your existing theme allowing it to be modified in appearance and style without affecting its design and code. This opens up endless  design possibilities and is a turnkey solution for quickly setting up a niche website. Woo themes currently offer four child themes based on the Shopfront parent theme, that can be adapted to your own site-specific needs. Apart from that, you can create your own child themes, the tutorial for which is mentioned in the post.

To read the full article, click on this link: http://www.woothemes.com/2015/07/why-child-themes-matter/