Meaningfulness, personalisation and usability solve different customer-experience problems
Meaningfulness gives a customer experience emotional or practical significance, personalisation makes the experience more relevant, and usability reduces the effort needed to complete a task. They work together, but they are not interchangeable.
A personalised experience might recommend the right content or next step, yet still feel forgettable if it has no human value or clear brand meaning. A usable digital product might be quick and easy, yet feel generic if it offers no relevance or distinction. Meaningfulness asks what customers will take away from the interaction. Personalisation asks whether content, channels or choices fit their situation. Usability asks whether they can understand, navigate and act without unnecessary friction.
For complex content experience and omnichannel experience design, the aim is not personalisation at scale for its own sake. It is to give people a relevant route through information while keeping the journey clear, coherent and worth their time.
Sources: Four creative lessons B2B designers can learn from B2C, The Prompt: Are your brand guidelines ready to deliver behaviour?