Marketing Funnel · TOFU·MOFU·BOFU
Marketing Funnel: Top of Funnel / Middle of Funnel / Bottom of Funnel
What is a marketing funnel?
- The buyer journey split into three stages: awareness, evaluation and decision
- Each stage needs its own goal and content
- Real buying isn’t linear, so use the funnel as a placement tool
The first thing a funnel changes is the unit you use to evaluate content. Before, you judged whether a piece was good by views and reactions. Now you ask, “Which stage’s audience did this piece get to take one next action?” So the real output of a funnel is not the funnel diagram but a placement table listing each piece’s stage and next action (CTA), and ad spend and staffing are divided according to this table. Content with no assigned stage has no standard against which to judge whether it did well or not.
What separates the stages is not the content format but the question the customer is asking at that moment. “I didn’t even know this was a problem” is TOFU, “how many ways are there to solve it” is MOFU, and “why this company, of all of them” is BOFU. The same webinar is TOFU if it covers industry regulatory changes, MOFU if it compares three adoption approaches, and BOFU if it is a demo of your own product. Metrics differ too: for TOFU, look at new traffic; for MOFU, material downloads and return visits; for BOFU, the number of inquiries and the consultation conversion rate. In B2B, the day-to-day user, the technical reviewer, the purchaser and the executive stand at different stages at the same time, so even within a single client company you need content for all three stages.
The line between the marketing funnel and the sales funnel is drawn at MQL and SQL. Marketing wants to hand over people who have responded, while sales wants to receive companies worth meeting, so unless the handoff criteria are agreed in writing, lead counts rise and no one in sales meets anyone. At a minimum, write down three things: which actions trigger a handoff, how many days sales has to make contact, and where rejected leads go back to.
The most common mistake in practice is treating the funnel as the customer’s actual path. Today’s buyers finish much of their research through search and peer recommendations before they get in touch, so from our side they show up at BOFU. If you then say “they haven’t seen the comparison material yet, so let’s nurture them first” and drop them into a newsletter sequence, you end up stalling a manager who asked for a quote for weeks. Conversely, if you push only product brochures on every channel, you cut off the path for people who don’t yet know they have a problem. It is safer to treat a stage as a label for the question a buyer is asking at that moment, not a label for the person.
John KimInstructor John Kim, author of B2B Marketing Design and CEO of Nanum Consulting
Junyoung NohConsumer and generational trend analyst & AI content marketing specialistThe funnel metaphor traces back to the AIDA model, introduced by E. St. Elmo Lewis in 1898, and hardened into the buyer journey model through later advertising and sales theory. The three-stage labels TOFU, MOFU and BOFU became standard content-planning terms in the late 2000s as inbound marketing spread.
Consider a hypothetical case: Company A, a maker of industrial measurement and automation equipment with 140 employees and KRW 42 billion (≈ US$31,423,000) in annual revenue. Its website gets 3,800 visitors a month, but only 5 inquiries a month, and at best one of those turned into a sales meeting. A three-person marketing team spent six months reworking its content.
- When Kim, the marketing team lead, sorted 41 pieces of content from the past three years by stage, 33 turned out to be product brochures and catalogs, and the head of sales said, “Every inquiry we get only asks about price.”
- Ms. Lee, the content manager, interviewed six equipment engineers at client companies and spent three months publishing eight columns whose titles used their own words: “We log line downtime by hand, so we can never find the cause.”
- For the middle stage, they created a comparison guide of three options (build in-house, adopt an off-the-shelf product, or outsource part of it), required a company name and email to download it, and added a 45-minute practical webinar twice a month.
- For the bottom of the funnel, they split the product brochure into two adoption case studies, one for auto parts and one for food, and had sales use an ROI sheet in meetings: enter the number of machines and downtime hours, and it calculates the payback period.
- Together with the head of sales, they set “comparison guide download + 50 or more employees” as the MQL criterion, wrote a two-day contact rule into a document, and sent rejected leads back at the weekly meeting with a stated reason.
- Six months later, monthly inquiries rose from 5 to 14 and the meeting conversion rate climbed from 20% to 46%. Comparison guide downloads reached 310 in total and became next quarter’s sales list.