Performance Marketing · Media Buying
A media buyer who built the systems beneath the spend
Most performance marketing agencies optimise campaigns. We engineer the entire acquisition system: server-side tracking, attribution, the CRM that captures the lead and the automation that follows it. Meta Ads and Google Ads managed by a former Meta operator, not by an account juggling forty clients.
What a performance marketing mandate covers
Paid media is treated as an engineered system, not a tactical exercise. Before a single campaign goes live, the measurement layer is built: server-side tracking, attribution architecture, and conversion infrastructure that survives adblockers and privacy frameworks. Only then does the media buying begin.
Media buying
End-to-end management of Meta Ads, Google Ads, TikTok Ads and DV360: campaign structure, bid strategy, creative iteration, budget allocation, continuous cost-per-result optimisation.
Server-side tracking
Proprietary tracking layer with dual-pixel stealth proxy, Meta CAPI offline conversions, and synthetic-ID fallback. Your data stays reliable even where standard pixels fail.
Attribution & measurement
GA4, BigQuery, Looker Studio. You know which campaign produced which sale, including offline sales in a physical shop attributed back to the originating ad.
CRM & automation
The lead does not get lost. Proprietary CRM captures it, automated email and WhatsApp flows follow it, and nothing slips through between click and conversion.
The platforms managed
The track record
Four years inside Meta's vendor network across six progressive roles, managing portfolios of up to 1,540 advertisers across twelve markets and training 800+ advertising specialists. Today, that operating discipline is applied directly to a small number of SME and e-commerce clients. Documented results from one client, an Italian furniture maker, over three years:
Who this is for
SMEs, e-commerce businesses, artisanal manufacturers, retailers with a physical point of sale, professional practices. Companies that want a single accountable interlocutor for the whole acquisition function, not a fragmented chain of an agency for the ads, a freelancer for the site, and a consultant for the tracking. If you are searching for a media buyer or a performance marketing agency that understands both the campaigns and the engineering beneath them, this is the mandate.
Frequently asked questions about advertising campaigns
How much does an advertising campaign on Meta or Google cost?
It depends on ad budget, sector and objective. The budget splits in two: the ad spend that goes to Meta or Google (you decide it) and the management fee. On one real client, a furniture maker, three years of campaigns totalled €74,013 in ad spend at an average of €0.13 per site visit (€0.08 in the best campaigns). The first conversation to estimate your case is free.
What is the difference between a media buyer and a marketing agency?
A traditional agency assigns you an account managing many clients at once, often splitting the work across departments that don't talk to each other. A dedicated media buyer like Costantini & Partners is your single interlocutor for the entire acquisition function: campaigns, tracking, CRM and automation under one accountability. No fragmented chain, no hand-offs.
How much budget do I need to start with Meta Ads?
There is no absolute minimum, but below a certain threshold the data isn't enough to optimise. What matters most is not how much you spend, but that every euro is measurable: before launching campaigns we build server-side tracking that connects spend to real sales, including in a physical shop. Without measurement, any budget is spent blind.
How do you measure the ROI of an advertising campaign?
With server-side tracking, Conversions API and attribution: every sale is connected to the campaign that generated it, including offline in-store sales attributed back to the online ad. Tools like GA4, BigQuery and Looker Studio give the full picture. So you know which campaigns pay and which waste budget, instead of relying on vanity metrics.
Freelance or agency for advertising campaigns?
The right question is not freelance or agency, but competence and accountability. Costantini & Partners combines the experience of four years inside Meta managing up to 1,540 advertisers with the accountability of a single interlocutor. No department passing blame, no junior learning on your budget.
How long before campaigns show results?
The first weeks let the system gather data and optimise. On real clients, a 35% reduction in cost per qualified lead was reached by the sixth month and maintained, while a footwear e-commerce saw −45% acquisition cost in twelve months. Advertising performance is an investment that matures, not a switch.
Let's talk about your acquisition
The first conversation is free. Tell us about your business and what you want to improve.
Submit a brief