Compare the work, not the package name
Two agencies may use the same words for very different services. One 'marketing campaign' may include strategy, creative production, advertising management, reporting, and landing-page work. Another may include only the advertising setup.
Ask for a written scope that identifies every channel, responsibility, deliverable, cost, and client requirement.
Separate agency fees from advertising spend
The agency fee pays for planning, management, creative work, reporting, or other professional services. Advertising spend is the amount paid to the platform for audience delivery.
The proposal should show both amounts. The client should know whether the agency adds a percentage, whether production costs are separate, and whether taxes or platform charges apply.
Confirm account ownership and access
Advertising accounts contain audiences, campaign history, conversion data, and billing records. The agreement should explain whether campaigns run through the client's account, the agency's account, or a managed structure created for the project.
The client should receive the level of access promised in the scope and understand what will be transferred when management ends.
Review relevant evidence
Case studies should explain the starting position, budget, work performed, period measured, and result. A percentage without the underlying context can be misleading.
Look for work related to the same objective, not merely the same industry. A lead-generation campaign and a public-awareness campaign require different evidence.
Ask how the strategy connects to visibility and credibility
A good agency should explain how the campaign will generate attention and why the audience will trust the offer after arriving.
If the plan focuses only on clicks, ask what happens on the website. If it focuses only on brand presentation, ask how the right audience will find it.
Know what the client should receive
A managed advertising campaign should leave a clear record. Depending on the scope, that may include objectives, audience definitions, keyword or interest research, creative assets, landing pages, tracking setup, budget records, campaign reports, optimization notes, and a final handover.
The client should also know which files, accounts, and data remain available after the project.
Read the performance report carefully
A report should connect platform activity to the business objective. Impressions and clicks can be useful, but they do not automatically represent sales, qualified leads, or profit.
Review spend, reach, click cost, conversions, lead quality, sales value, return, and any important drop-off between the advertisement and the final action.
Allow for testing without accepting endless waste
New campaigns need time and data to identify useful audiences, messages, and creative. Weak early performance is not always evidence of poor management.
The agency should still explain what it learned, which changes were made, and why continued spending is justified. Testing should produce decisions.
Watch for selective reporting
A report can look positive when it highlights the best metric and hides the rest of the customer journey.
Ask for the complete picture, including campaigns that were paused, creative that failed, leads that were unqualified, and tracking limitations. Honest reporting is part of the service.
Choose the agency that can explain the money
The strongest agency is not necessarily the one projecting the largest return. It is the one that can show where the budget goes, how the campaign will be judged, what data the client will receive, and how the strategy will change when the evidence changes.