If you would like to learn more about SAP testing in software quality assurance then the best place for you to do that would be online however that does not mean you should just proceed to any website to start learning about SAP testing or any other technical element relating to software engineering. Instead, you would need a website that is well organised in providing technical knowledge about various aspects of software engineering and quality assurance.
There are various stages involved in sap testing and the right company that specialises in it would be able to take care of your requirements effectively. From unit testing to user acceptance testing everything will have to be correctly tested and approved before a software can be deemed good enough for the market.
A good website that you could refer to for detailed information on sap testing as well as many other elements of software quality assurance would be https://sqasolution.com/software-test/sap-testing/ which you might want to bookmark and visit to learn more about specific elements of software engineering.
The main aim of SAP testing is to ensure that an installed program performs in accordance with your business requirements. So, if you have a specific business tool with a number of applications that require testing then sap testing might be something that you will want to consider going for.