Zhimin Zhan explains in simple words what Continuous Testing is, why it's important, how it differs from other practices, and finally links to many other helpful resources.
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What mobile testing is all about? Martyna Wiśnik wrote a comprehensive guide that describes the biggest challenges and advises what to focus the testing efforts on.
I truly admire Sam Connelly for being transparent and sharing the impressive career growth as a software tester in such detail and honesty, including some great references.