Google Search Console is perhaps the least well known of the 4 main google web assets, but it's not to be under-estimated.
It's main purpose is to help you rank better in google by showing you useful metrics and errors that can help you to optimise your website and drive more traffic.
It's not as complex as Google Analytics, but it's essential for any business trying to gain some organic traffic.
Here's a helpful guide on what Google Search Console is and how it can help your business.