Advertising and Data

Introduction

Paid advertising can bring readers to a good book, and it can also drain money quickly. It is a business tool, not a magic switch. The rule of this lesson: never spend what you cannot afford to lose, and decide from your own numbers.

This course does not recommend specific budgets or promise returns. Platform interfaces and rules change, so read the current help pages for the ad service you use.

How ads are usually billed

Many book advertising systems use pay per click (PPC): you set a bid, and you pay only when someone clicks your ad, whether or not they buy. The key numbers:

• Impressions: how often your ad was shown
• Clicks: how many people clicked
• Click-through rate (CTR): clicks divided by impressions
• Spend: what you paid
• Sales or page reads attributed to the ad
• Conversion rate: the share of clicks that lead to a sale
• ACOS (advertising cost of sale): ad spend divided by ad-attributed sales revenue, as a percentage

Break-even thinking

An ad is only profitable if the royalty you earn from the sales it brings exceeds what you paid.

Example with invented numbers, to show the method:

Book price: 4.99
Royalty per sale: 3.00   (your actual royalty depends on price, format and territory)
Break-even cost per sale: 3.00

If your ads cost 2.00 on average for each sale, you make about 1.00 per sale.
If they cost 4.00 for each sale, you lose 1.00 per sale.

So your break-even cost of sale equals your royalty per sale. An ACOS of 100 percent against the royalty means break-even, and lower is better. For a series, readers who buy further books later change the maths, but be cautious about counting income you have not yet seen.

Run controlled tests

1. Set a small, fixed daily budget that you can lose entirely.
2. Start with a few relevant targets, such as comparable books or topic keywords. Broad, vague targeting wastes money.
3. Write an honest ad creative that matches the book. Misleading ads cause refunds and bad reviews.
4. Wait for enough data. A handful of clicks tells you little, and results fluctuate.
5. Change one thing at a time, such as the target, the bid or the cover, and record it.
6. Pause targets with many clicks and no sales, and put more into those that earn a profit.
7. Review weekly, not hourly.

If an ad gets plenty of impressions but few clicks, the cover or title may need work. Plenty of clicks but few sales suggests the description, price, reviews or sample are not convincing.

Track real profit

Keep a simple table:

Be honest about all costs, including your own time. Ads in one place can also change sales elsewhere, so look at the total picture.

Data about readers

If you run a mailing list or a website, you can learn more: which sources bring sign-ups, which emails get opened, and which books readers click. Respect privacy rules, collect only what you need, get consent where required and keep data secure.

Be sceptical of hype

• Courses and gurus that promise consistent profits from ads should be treated cautiously. Results depend on the book, the market and the competition.
• Screenshots of high earnings are selective. You rarely see the costs or the failures.
• Never share your account password, or give strangers control of your advertising account.
• Stop if you are losing money without learning anything useful.

Alternatives that cost no money

Newsletter swaps with similar authors, building your own list, social media in your niche, and writing the next book are all free ways to grow, and combine well with small paid tests.

Try it yourself

Find your real royalty per sale for one book. Calculate your break-even cost per sale. Then plan a two-week test with a small fixed budget, with a clear rule for when you will stop.

Summary

• Ads are usually pay per click, and break-even cost per sale equals your royalty per sale.
• Test small, change one thing at a time, wait for enough data and track true profit.
• Be sceptical of hype, protect your account and only spend what you can afford to lose.