Agencies applying updates across dozens of client sites face a consistent challenge: the issues that matter most, such as broken forms, failed checkouts, and layout regressions, rarely surface on the homepage. Without a structured testing process, these issues surface only when a client notices. Mike Miler, Founder of WebChange Detector, works with agencies on exactly this problem and brings a grounded, tool-informed perspective on where testing effort actually pays off.

Key topics include:

• The practical difference between testing, monitoring, and QA, and why each serves a different purpose in a maintenance workflow
• How regression testing and visual testing work, and the distinct failure types each one is designed to catch
• Which change types carry the highest risk: plugin and theme updates, design changes, third-p ...