Day 22: The Importance of Validation (30 Days to Learn HTML & CSS) - YouTube

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Let's refer back to the markup we created in the previous lesson. Wouldn't it be helpful to be notified when we make errors in creating our markup?

This is part of the free Envato Tuts+ course 30 Days to Learn HTML & CSS: https://webdesign.tutsplus.com/courses/30-days-to-learn-html-css

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