Definition:
User-centred design is a framework to gain an explicit understanding of the needs, motivations and limitations of end-users so that such user characteristics can be considered and fed into each stage of the design process.

Resources:
Conversion marketing – Glossary of Conversion Marketing.
Usability testing – How to do usability testing to improve conversions.
Card sorting – 6 card sorting tools to improve your website’s navigation.
Tree testing – How to use tree testing to improve findability on your website.
Over 300 tools reviewed – Digital Marketing Toolbox.
A/B testing software – Which A/B testing tools should you choose?