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Articles by Igor Ivitskiy
How Much Signal Differential Privacy Takes From Your Dashboards, in Events
Somebody ships a differential privacy layer in front of the event store and leaves the dashboards sitting on top of it. The queries still return, the totals still look like totals, and the ticket gets closed. Nobody on the team computed the floor. Every private aggregate carries noise, and the noise is unlabeled. It sits in the same cell somebody reads on Monday morning before deciding whether a segment moved, and to the eye it looks like a small real change.
Five Things a Year of Putting AI Into My Own Business Taught Me
Everyone in marketing is being told to put AI into their business, and most of the advice skips the part where it goes wrong. Before I get into that, here is why I am the one telling you: I am Igor, I have spent about fifteen years buying paid media, I run Doctor Ads, and I have audited hundreds of advertising accounts. For the past year I have been testing AI systems across marketing and sales on every one of my own projects.
The Unaudited Line: Why Marketing Spend Escapes the Controls Every Other Cost Faces
Marketing budgets now represent 9.4 percent of company revenues and 11.4 percent of total company budgets, up from 7.7 and 10.1 percent a year earlier, according to The CMO Survey published in April 2025, which surveyed 281 marketing leaders at US companies. The survey reports averages rather than a ranking of cost lines, but at that share marketing is a material discretionary line in most of the businesses it covers.
How to tell an ad experiment is unwinnable before you run it
Most experiments that come back "no clear winner" were unwinnable on the day they launched. The data could not resolve an effect that size, and no amount of extra runtime was going to change that. You can find this out in about two minutes, before you spend anything, with one formula and a resampling pass over your own data. Here is the check, in three steps. Step 1.
Как настроить Google рекламу: руководство для начинающих
Настройка рекламы Google может быть сложной задачей для начинающих, но является важным этапом в развитии вашего бизнеса. Грамотно настроенная реклама может стать мощным инструментом привлечения клиентов и увеличения прибыли. Используя эту пошаговую инструкцию, вы сможете на автомате получать в свой бизнес заявки, клиентов и прибыль с Google Ads все 365 дней в году. Google Ads — это менеджер по рекламе, который не ест и не спит, а круглосуточно продает для вас.
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