E-commerce means the online services which serve buying and selling of goods through internet. it's works on business to business or customers to business or customers to customers.

E-commerce application/sites are like as a web applications or mobile application and during that's compatibility testings are passing through many process which is shown below : 

-> Functional Testing

-> Usability Testing 

-> Security Testing

-> Performance Testing

-> Database Testing

-> Mobile Application Testing

-> A/B testing.