First of all, CTS certification refers to the certification of Android compatibility test suite. Provided by Google, it is used to test the compatibility between the manufacturer's mobile phone and ROM. CTS is an important part of Android application development. Its purpose is to control the influence of different processor architectures and screen sizes of manufacturers' mobile phones on the compatibility of Android system, so as to improve the stability and operating experience of Android system.

Secondly, in order to obtain CTS certification, manufacturers need to design and develop mobile phone products according to Google's technical specifications and standards, and submit applications after completion. Google's CTS team will verify the compatibility of the core API, common apps, graphics and multimedia, network, device management and security of Android system in mobile phones. In this way, when consumers buy mobile phones and Roms from various manufacturers, they can avoid or reduce the compatibility problems of apps caused by different models and platforms.

CTS certification can provide a guarantee to ensure that the equipment gets the latest security updates and performance optimization. In addition, obtaining CTS certification can also promote the internationalization of manufacturers' mobile phone products and make them better adapt to the global market. However, this certification also represents the strict requirements and technical difficulties for manufacturers, so it is also a good market access threshold, which is conducive to outstanding manufacturers to stand out.