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Nov 13, 2026 · 5 min read
"If we buy 1,000 more clicks next month, how much will revenue go up?" It is the question owners ask most when they discuss the ad budget. The answer is not a feeling. It is a multiplication of three numbers. Once you have those three numbers, you also see something more important: buying more clicks is usually the most expensive way to grow revenue.
What follows comes from hands-on experience analysing advertising data for large brands. This calculation is always the first step, before anyone talks about raising or cutting the budget.
Watch the 75-second video (in Vietnamese)
The 3-number formula
Revenue = Clicks × Conversion rate × Average order value
- Clicks: how many people clicked your ad or visited your page this month.
- Conversion rate: out of every 100 visitors, how many buy. Orders divided by clicks.
- Average order value: revenue divided by orders.
Example: 1,000 clicks, 2% conversion, 500,000 VND per order. Revenue is 1,000 × 2% × 500,000 = 10 million VND. The numbers in this article are examples chosen to be easy to follow, not one store's results.
Three ways to grow revenue
From those 10 million, there are three ways to grow, each pulling one number:
| Lever | Change | Revenue | Extra ad spend |
|---|---|---|---|
| Today | 10M | ||
| 1. Buy more clicks | 1,000 → 2,000 clicks | 20M | Doubled |
| 2. Raise conversion | 2% → 3% | 15M | 0 |
| 3. Raise order value | 500k → 600k | 12M | 0 |
| 2 and 3 together | 3% and 600k | 18M | 0 |
Lever 1 gives the biggest number on paper, but ad spend rises with it. In practice it is harder still: when you raise a budget fast, the cost per click tends to creep up, because the ads have to reach less interested people. And when you stop paying, the clicks stop too.
Levers 2 and 3 need no extra ad money. Doing both gets you 18 million, close to doubling your clicks. That gain also stays next month and the month after, because it lives in your sales pages and the way you sell.
How to raise your conversion rate
When people click and do not buy, it is usually for one of these reasons. Check on a phone, as a stranger would:
- Clear photos and prices: real photos from several angles; price, delivery fee and delivery time right on the page.
- A visible return policy: first-time buyers need to know what happens if it does not fit.
- One-tap contact: the hotline starts a call, the Zalo button opens the right account, the form reaches the right inbox. Our 5-minute website check has all 7 steps.
- Fast replies: if a customer asks the price and hears back three hours later, they have bought elsewhere. Aim to reply within 5 to 10 minutes during selling hours.
- Real reviews: a few comments and photos from customers who received their order.
- A page that loads fast on mobile: if it takes too long, many people leave before they see the product.
How to raise your order value
- Bundles: group products people buy together, priced slightly below buying them separately.
- Add-ons: suggest a small matching item at checkout.
- Free delivery above a threshold: set it about 10 to 20% above your current average order value.
- Bigger sizes or packs: give customers a better deal when they buy more.
You need your own real numbers
The formula is simple; the hard part is having the three real numbers. Many stores know their clicks from the ads manager, but orders are scattered: some on the marketplace, some in Facebook and Zalo chats, some in a notebook. Then nobody knows the real conversion rate, and every budget decision is a guess.
The simplest way to start: one spreadsheet, one row per month, with clicks, orders and revenue for each channel. Over time, orders from every channel should flow into one place you own, such as your own website and order system. Then the three numbers are there every month, and your customer data stays in your hands rather than on someone else's platform. For the value of returning customers, see how much a returning customer is worth.
Calculator: which lever first?
Enter last month's numbers. The calculator works out your conversion rate and order value, then compares the three levers: buying clicks, raising conversion, raising order value.
What to do today
- Get last month's numbers: clicks (or visits), orders, revenue.
- Conversion rate = orders ÷ clicks; order value = revenue ÷ orders.
- Enter them in the calculator above and set a realistic target, for example conversion up by 0.5 percentage points.
- Pick one item from the conversion or order-value lists and do it this week.
- Next month, recalculate and compare before deciding to raise the ad budget.
If your orders are scattered across many places and you want them in one place so you have real numbers every month, message LaPage.
