Customer experience (CX) is the sum of every impression a customer has of your company: from the first ad in their feed to a support call six months after purchase. Customers don't split your company into departments. To them, it's one story, and they judge it by its worst moment, not its best.
Most businesses manage separate pieces of that story. Marketing owns leads, sales owns deals, support owns tickets. Each department has its own KPIs and hits them. Nobody sees the whole picture.
A typical scenario: a sales rep takes the customer through the deal flawlessly, and the customer leaves after their first support request. A templated reply, a three-day wait, yet another request to resend the contract number. Sales did its job, support technically did too, and the company lost the revenue. According to Zendesk CX Trends 2026, 85% of CX leaders say a single unresolved issue is enough to lose a customer.
CEM is a methodology that shows every stage of the customer journey, finds the gaps between expectation and reality, and closes them systematically. Not as a one-off “let's improve service” campaign, but as a process with metrics, owners and regular reviews.
We covered why customer experience directly affects revenue, and where exactly businesses lose money on it, in a separate
guide to customer experience management. This piece has a different focus: how to build the strategy itself and which tools it needs.