Best OBD2 scan tool?
 

What is the best OBD2 scan tool that's consumer grade? I'm looking to purchase one. All I know about the tools is that they are able to read engine light codes and clear them.
What are other things that these scan tools can be used for? And what is a good scan tool? Sorry if this is the sub.

Edit:guys i found a site near me and it does free shipping too!! https://ljmcardiagnostics.co.uk/
Thanks you!