Marketing Terms Explained in Plain English: CPC, CPM, CAC, LTV and More
Marketing has a vocabulary problem. The ideas are simple, but the jargon makes beginners feel locked out. This page fixes that: every term you will meet in any ad platform, marketing report or agency call, in one plain sentence each.
The money terms
- ·CPC (cost per click): what you pay each time someone clicks your ad. A $2 CPC means 100 clicks cost $200.
- ·CPM (cost per thousand impressions): what you pay for 1,000 people to SEE your ad, whether or not they click. A $10 CPM means $100 shows your ad about 10,000 times.
- ·CPL (cost per lead): what you pay for one person to give you their contact details or ask about your offer.
- ·CAC (customer acquisition cost): the big one. What one paying customer costs you to get, all-in. If you spent $300 and got 6 customers, your CAC is $50.
- ·LTV (lifetime value): everything one customer is worth over the whole relationship, not just the first sale. A $30/month gym member who stays 8 months has an LTV of $240.
The only equation that matters: a business works when LTV is comfortably bigger than CAC. Everything else in marketing is detail.
The behavior terms
- ·Impression: one person seeing your ad once.
- ·CTR (click-through rate): the share of people who see your ad and click it. Typical click rates vary widely by platform and industry, so compare with your own past ads.
- ·Conversion rate: the share of visitors who do the thing you want (buy, book, call). Typical rates vary widely by industry and price.
- ·Retargeting: showing ads to people who already visited you. They convert several times better than strangers because they already know you.
- ·Organic: customers you did not pay ads for. Search results, social posts, word of mouth, your Google Business Profile.
- ·Funnel: the path from stranger to customer: see ad, click, visit, buy. Fewer people survive each step, which is why 10,000 impressions might mean 10 sales.
The planning terms
- ·Break-even: how many sales pay back your marketing spend. $200 budget, $20 profit per sale: you break even at sale 10. Sale 11 is where you start making money.
- ·Benchmark: what businesses like yours typically achieve. Useful as a starting guess, never as a promise.
- ·Positioning: the one-sentence reason someone picks you instead of the competitor next door.
- ·Channel: any place customers can find you. Google, Instagram, a farmers market, a referral. Beginners spread across five channels; winners go deep on one or two.
More terms you will meet, with the formula
The first part of this page covers the essentials. These are the next terms that show up in ad dashboards, agency reports and marketing advice. Each comes with the simple formula behind it:
| Term | Plain meaning | Formula or example |
|---|---|---|
| ROAS (return on ad spend) | Revenue earned for each dollar of ad spend | Revenue from ads divided by ad spend. $1,000 of sales from $250 of ads is 4x |
| ROI (return on investment) | Profit earned relative to what you spent | (Profit minus cost) divided by cost. Profit counts costs, so it is lower than ROAS |
| AOV (average order value) | What a typical order is worth | Total revenue divided by number of orders |
| Gross margin | The share of revenue left after the direct cost of delivery | Revenue minus direct costs, divided by revenue |
| Lead | A person who has shown interest and given a way to contact them | A form submission, a call or a message |
| Lead magnet | A free item offered in exchange for contact details | A checklist, guide, quote or trial |
| PPC (pay per click) | Advertising where you pay when someone clicks | Google Ads search campaigns are the classic example |
| SEO (search engine optimisation) | Earning free search traffic by being the best result | Helpful pages, clear titles, reviews and good links |
| Bounce rate | The share of visitors who leave after one page | High is not always bad: a quick phone number lookup is a success |
| Attribution | Deciding which marketing gets credit for a sale | Last-click gives the final touch all the credit |
| UTM tag | A label on a link that shows where a click came from | Added to the end of a URL so analytics can group traffic |
| A/B test | Comparing two versions to see which performs better | Change one thing, split traffic, compare results |
| Lookalike audience | People similar to your existing customers | An ad platform builds it from a list of your customers |
| CRM | Software that stores customers and follow-ups | A spreadsheet is a fine CRM at the start |
| KPI | A number you track to know if the plan is working | Cost per customer is the most useful one |
Real numbers for the main ones
Terms are easier to remember with real figures. LocaliQ's 2026 benchmarks of US small-business Google Ads campaigns put the all-industry average at about $5.42 per click, a 6.64% click rate, an 8.18% conversion rate and $66.69 per lead. Those four figures connect the money terms to the behaviour terms: the click rate is how many people who see an ad click it, the conversion rate is how many of those clicks turn into leads, and cost per lead is the result.
The averages vary a lot by industry. Restaurants and food average about $30.57 per lead, while attorneys and legal services average about $131.63. You can see your industry in the advertising budget calculator.
Which numbers matter at each stage
| Stage | Watch these | Ignore for now |
|---|---|---|
| Just starting | Leads, conversations, where customers come from | Impressions, followers, brand awareness |
| Running your first ads | Cost per click, cost per lead, close rate | Complicated attribution models |
| Growing steadily | CAC, payback time, LTV to CAC, ROAS by channel | Vanity metrics such as likes |
| Established | Retention, repeat purchase, referral rate | Short-term swings in single campaigns |
A simple test for any number in a report: if it doubled next month, would you earn more money? If the honest answer is "I do not know", it is probably a vanity metric.
Vanity metrics and the numbers that pay the bills
Vanity metrics are numbers that feel good and do not pay anything: followers, likes, impressions and page views. They are not worthless, since they can show whether a message is landing, but they are not results. The numbers that pay the bills are leads, customers, revenue and profit, along with the costs that produced them. If a report cannot connect its numbers to leads or customers, ask what the number is for. The customer acquisition cost guide shows how to connect spend to customers.
Terms agencies use that you can safely translate
- ·"Full-funnel strategy": a plan that covers people who have never heard of you, people considering you and people ready to buy.
- ·"Optimising for conversions": adjusting the ads and pages so more visitors become leads or customers.
- ·"Brand awareness": getting known, which is hard to measure and usually not where a small business should start.
- ·"Scaling": spending more on something that already works, not on something you hope will.
- ·"Reporting": a summary of results. Ask what number it will show you each month, and what happens if that number is bad.
Frequently asked questions
What is the difference between ROAS and ROI?
ROAS divides the revenue from ads by the ad spend and ignores other costs. ROI subtracts all costs from the profit before comparing it with what you spent. A campaign can have a healthy ROAS and still lose money once the cost of delivering the work is counted.
What is a good conversion rate?
It depends on the industry and the offer. Many websites convert in the low single digits of percent, while search ads for urgent local services can convert far higher. Compare yourself with your own industry, which you can see in the advertising budget calculator, rather than with a general figure.
Do I need to understand all of these?
No. Cost per lead, close rate, cost per customer and lifetime value cover most small business decisions. Learn others when you meet them. The free marketing calculators do the arithmetic for you.
What is the most important marketing term?
Customer acquisition cost, because it tells you whether your marketing makes or loses money. The CAC calculator works it out from your own spend and customers.
How to actually use these
You never need to calculate any of this by hand. When a report tells you "expected cost per customer: $40-70", you now know exactly what that means: each new customer will cost you roughly $40-70 of ad spend. If your profit per customer is bigger than that, the plan works. If not, the plan needs to change. That is the entire skill.
Our free tool does all this math for your exact business, budget and country, and explains every number it shows. You will never see a figure without the sentence that explains it.
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