Forget channels for a second. A modern GTM engine has three jobs. Get the right people to notice. Convert the ones who notice into qualified opportunities. Bring back the ones who didn't buy the first time until they do. That's distribution, conversion, lifecycle. Three layers. Every channel sits inside one of them.
Distribution is everything that creates attention. Organic social, paid ads, SEO, AI search citations, podcasts, partnerships, PR. The job of this layer is volume of qualified eyeballs. The metric is reach into your ideal customer profile, not total reach. 1M views from the wrong audience is worth less than 100,000 views from the right one.
Conversion is the website, the landing pages, the offer, the proof, the call to action. The job is to turn the visit into a next step. The metric is qualified leads or sales per 1,000 visitors. At Ignis we measure this every Monday. A conversion rate jump from 1.2% to 2.4% on the same traffic doubles the business.
Lifecycle is what happens after the visit. Email sequences, SMS reminders, retargeting ads, personal follow-up from sales. The job is to bring back the 95% who didn't buy on the first visit. The metric is revenue per lead acquired. This is where most operators leak the most money. They spend $200 to acquire a lead and then never send them another touchpoint.
The mistake is thinking these are separate teams or separate budgets. They aren't. A great hook in distribution dies if the website it points at is ugly. A great website dies if no one ever lands on it. A great lifecycle sequence dies if the leads coming in were never qualified. The three layers are one machine. Fix the weakest layer first, then the next weakest. Do not optimise the strongest layer. That is the most common mistake we see.