Most marketing plans are lists of channels. SEO, paid ads, email, social, influencers. Each gets a budget and a target. The plan looks complete, and then a quarter changes, a number dips, and nobody can say why a channel is on the list or when to drop it.
A growth thesis is different. It is a short written argument about where your growth will come from and why. It names the one thing holding you back, the bets you will make to fix it, and the numbers that will tell you if you are right. Because it explains the reasoning, it still makes sense when the quarter changes.
Channel plan versus growth thesis
A channel plan answers "where will we spend?" A growth thesis answers "what has to be true for this store to grow, and what are we doing about it?"
Here is the practical gap. Suppose paid ads get more expensive. A channel plan has no answer, so people argue about bids. A thesis already says which number matters (for example, profit per customer over a year), so you can check whether higher ad costs still pay back. You decide with evidence, not mood.
A thesis also survives staff changes, new agencies and budget cuts. Anyone can read it and see what you believe and what you are testing.
What a growth thesis contains
Keep each part to a few lines.
1. Target customer and what they buy
Describe who buys, what they buy first, and what they buy next. Be specific. "Women 25 to 40 who buy a starter kit, then a refill" beats "skincare lovers". Use your order data, not guesses.
2. The constraint
A constraint is the one thing limiting growth right now. Pick one of five:
- Traffic: too few of the right people visit.
- Conversion: visitors do not buy.
- Margin: you sell, but little profit is left.
- Retention: customers buy once and leave.
- Tracking: you cannot trust your numbers.
Fix tracking first if it is broken, since every other decision depends on it. Otherwise, choose the weakest link. Pushing more traffic into a store that does not convert just wastes money.
3. The bets and their order
A bet is a specific action with a reason. Two or three is enough. Put them in order, and say why the first one goes first.
4. The numbers that prove or kill each bet
For each bet, write the metric, the starting value, the target, the date, and the kill line. The kill line is the result at which you stop. Write it before you start, when you are not emotionally invested.
5. What you will not do
This part is often skipped, and it matters most. Listing what you will not do protects focus. "No marketplaces this year" saves many meetings.
A fictional worked example
This is an invented store, "Glow Lane", a D2C skincare shop. Every number is made up for illustration.
Where it stands. 20,000 visits a month at a 2% conversion rate gives 400 orders. Average order value is 40. Revenue is 16,000 a month. Gross margin is 60%. Only 10% of first-time buyers order again within 90 days.
Target customer. Buyers aged 25 to 40 who start with a 40 cleanser or serum and could reorder every two months.
Constraint. Retention. With 400 new orders a month, 10% repeat means 40 reorders. Buying traffic to fill a leaky store is the weaker move.
Bet 1: a reorder reminder flow. Email reminders timed to when the bottle runs out. Target: lift 90-day reorder from 10% to 15%. That is 60 reorders instead of 40, so 20 more orders. At 40 each, that is 800 more revenue a month, and about 480 more gross profit (800 x 0.6). Kill line: if the reminders have not lifted reorders at all after two full cohorts, stop and rethink the offer.
Bet 2: product page fixes. Clearer ingredients, reviews higher on the page, a visible delivery date. Target: conversion from 2.0% to 2.2%. That is 440 orders instead of 400, so 40 more, or 1,600 more revenue a month. Kill line: if a split test shows no gain after enough orders to judge, revert.
Bet 3 (later): more paid search. Only after bet 1 is proven. Higher repeat rates let you pay more to win a first order.
What we will not do: discounts above 15%, marketplaces, new product lines, and chasing every social trend.
Real results will differ. The point is that each bet has a number, a date and an exit.
How to review it monthly
Set aside 45 minutes. Ask four questions:
- Did the numbers for each bet move as expected?
- Is the constraint still the constraint? If reorder rate hits the target, conversion or traffic may now be next.
- Has any bet reached its kill line? If so, stop it and write down what you learned.
- Did we do anything on the "will not do" list?
Change the thesis only when evidence says so, and note the date and reason. Do not rewrite it every time a channel report looks bad.
Signs your plan is just a channel list
- Every line starts with a channel name.
- Targets are traffic or follower counts, not customer outcomes.
- Nobody can say which problem it solves.
- There are no kill lines.
- It has ten or more priorities.
- It looks the same as last year, with bigger numbers.
Keep it to one or two pages
Short forces clear thinking. Use one heading for each part. Write in plain sentences, and put the numbers in a small list. If it runs past two pages, you probably have too many bets or are explaining things nobody needs. Cut until a new team member can read it in five minutes.
What to do next
- Pull the last twelve months of orders and write down who buys, what they buy first, and what they buy next.
- Check the five constraints against your data and choose one.
- Write two or three bets, each with a metric, a target, a date and a kill line.
- Add a short "will not do" list, then trim the document to two pages.
- Put a monthly 45-minute review in the calendar, starting with the thesis itself.