Only by linking HubSpot's CRM data with the "after" that cannot be seen outside the advertising platform -- whether the person who clicked became a contact, developed into an MQL, or ultimately received an order -- can you understand the "true ROI of advertising." We will explain the overall picture of CRM-native advertising operations, from ad connection to segment integration, Lookalike audience, and attribution analysis.
Advertising platforms (Google Ads, Meta Ads, LinkedIn Ads) have powerful targeting and a wealth of data. However, on a standalone basis, you can only see numbers from the advertising side, such as ``clicks and conversions.''What happened to the person who clicked?——If you don't connect to CRM, you will never know whether you became a contact, developed into an MQL, or finally received an order.
| Functional category | What you can do | Compatible plan |
|---|---|---|
| Advertising account connection | Connecting Google/Meta/LinkedIn advertising accounts and displaying basic insights | All plans (limited number of connections) |
| Audience sync | Automatically sync HubSpot Segment lists to advertising platforms | Starter ~ (Limited number of synchronizations) |
| Lookalike audience | Generate new audiences similar to existing customers/MQLs on advertising platforms | Starter〜 |
| Advertising conversion measurement | Measure and send form submissions, deal creation, and orders as ad conversions | Professional〜 |
| Attribution analysis | First-touch, last-touch, and multi-touch revenue attribution | Professional〜 |
| Breeze AI Ad Optimization | Advertising creative generation, audience recommendation, budget allocation proposal | Professional〜 |
HubSpot's ad management Integration with CRM data, attribution analysis, audience collaborationis its strength. Each advertising platform (Google Ads Management Screen/Meta Ads Manager) has higher functionality for detailed A/B testing of ad creatives and optimization of bidding strategies.HubSpot understands who clicked and what happened in the end, and the advertising platform optimizes which creative keywords are most effective.——This division of roles is the basic idea.
Connect your ads to HubSpot マーケティング → 広告 Start from By connecting, you will be able to check basic ad metrics (impressions, clicks, and conversions) on HubSpot's advertising dashboard, and audience sync will also be enabled.
マーケティング → 広告 → アカウントを接続 Click and select the target platformTo connect LinkedIn Ads, the account you want to connect to HubSpot must be in LinkedIn Campaign Manager."Campaign group administrator" or higher authorityMust have. You cannot connect with "viewer" privileges, so please check with your advertising representative before starting work.
The biggest strength of HubSpot ad management is Segment lists can be synced directly to ad platform audiencesThat's true. Since you can directly target your ads to the ideal audience defined in your CRM, it is much more accurate than targeting only within the advertising platform.
The synchronization isreflected in both directions in real time. If a contact is added to a HubSpot Segment, they will be added to the ad audience, and if they leave the segment, they will be automatically excluded from the ad audience. This makes it possible to automate dynamic audience management, such as ``not showing the same advertisements to existing customers'' and ``stopping advertisements to people who have become MQLs and switching to nurturing''.
Deliver advertisements with related content and limited offers to anonymous and known visitors who have visited a specific page (price page/feature page) but have not yet converted.
Segment condition: Price page visit AND no conversionIncrease the frequency of contact with leads who are being nurtured by email in the workflow by sending advertisements in parallel with emails. Even leads with low email open rates can be reacquainted with ads.
Segment Condition: Lifecycle = Lead AND Low Email EngagementExisting customers get a bad impression when new ads such as ``Get Started Now'' and ``First Time Free'' are displayed. Set existing customer segments as "excluded audiences" for advertising to eliminate wasted advertising for new acquisitions.
Segment condition: Lifecycle = Customer (exclusion setting)Define a list of people in charge of the target accounts that sales are aiming for as a segment, and pinpoint advertising on LinkedIn. Ultra-precise targeting by company name and domain is possible.
Segment Condition: ABM target company contactEach ad platform has an audience enabledminimum sizeis set. A minimum of 1,000 Google Customer Matches, a minimum of 100 Meta Custom Audiences (1,000 or more recommended), and a minimum of 300 LinkedIn Matched Audiences. If it is less than this, the ad will not be delivered as the audience is considered "insufficient size".If the Segment size is too small, loosen the criteria a little or expand it with Lookalike audiences.is a realistic measure.
Lookalike audienceis a function that allows the advertising platform to automatically find new users who are ``very similar'' to existing good customers/MQLs. By using HubSpot's CRM data as a "seed audience," you can generate high-quality Lookalikes.
| Type of seed | Recommended size | Expected effects |
|---|---|---|
| Customers in the past 12 months | 100 items ~ (The more, the accuracy ↑) | High-quality Lookalikes are generated by learning the features that are most “close to order” |
| MQL and above leads | 500 items ~ | Alternative when there are few customers. Generate an audience similar to those with high purchase intent |
| High engagement contacts | 1,000 items ~ | People who are active in opening emails and browsing the web. Effective in the awareness expansion phase |
| Customers in specific industries/positions | 100 items ~ | Lookalike specialized for niche industries and occupations. High accuracy but low volume |
HubSpot by 2025-2026 Breeze AI now supports advertising creative generation. Just input your advertising campaign goals, target audience, and brand guidelines, and it will automatically generate copy ideas, headline ideas, and CTA suggestions.
When you input your campaign goals, target persona, and product characteristics, it automatically generates a candidate set of 15 Google ad headlines and 4 descriptions, as well as Meta primary text, headlines, and descriptions. Generate multiple variations at once for A/B testing.
It works with Marketing Studio's AI image generation function to automatically generate visual materials for banner ads and SNS ads in line with Brand Identity. You can mass-produce creatives with consistent brand colors, fonts, and tones.
Based on your campaign goals and existing success story data, Breeze suggests the next audience segment to try. AI sometimes discovers combinations that would not be noticed manually.
It analyzes past ROAS and CPA data for each advertising platform and campaign and makes allocation recommendations such as ``the budget should be increased for this campaign'' or ``the budget should be decreased for this campaign.''
Attribution analysis is the process of numerically understanding ``which advertisements, contents, and channels contributed to the final orders and revenue.'' HubSpot offers multiple attribution models, allowing you to choose the method to calculate contribution that's right for your business.
マーケティング → 広告 → アナリティクス You can check from You can check not only the number of impressions, clicks, and conversions, but also how many yen of orders those conversions ultimately led to for each ad campaign, ad group, and individual ad.
You can see each contact's "original source" (first point of contact) and "source before final conversion". In the business negotiation/order report, calculate which advertising campaign resulted in the most business negotiations, and use this information as the basis for budget allocation.
Advanced reports available for Professional and above. Allocate and display revenue across all channels, content, and advertisements a contact interacts with before accepting an order. You can perform deep analysis such as ``Which blog articles contribute to orders?''
“Ad A has a high number of clicks, but a low MQL conversion rate” and “Ad B has a low number of clicks, but a high order rate”—these differences cannot be seen from the advertising platform alone. Only when combined with HubSpot's CRM data can you make the right decisions.
It is dangerous to look at ad evaluation metrics only in terms of CTR (click-through rate) or CPC (cost per click). Even if your CTR is high, you may just be attracting low-quality clicks. At HubSpot“MQL conversion rate of contacts via advertisements” “Order rate of business negotiations via advertisements” “LTV via advertisements”The best practice for 2026 is to set CTR and CPC as the main KPI and view CTR and CPC as supplementary indicators.
As third-party cookies are phased out, the decline in ad measurement accuracy is becoming an industry-wide issue. HubSpot has two main countermeasures.① Utilization of server-side conversion API(Meta CAPI/Google Enhanced Conversions) - Sends conversion data directly from the server to the advertising platform instead of via the browser.② Strengthen first-party data——Using HubSpot CRM's first-party data collected from forms, chats, and membership registration for advertising seeds and Lookalike enables highly accurate advertising operations that do not rely on cookies.
By connecting ``post-click actions and orders received in CRM'' that cannot be seen with the advertising platform alone, true advertising ROI can be calculated for the first time.
Sync HubSpot's Segments to your ad audiences in real time. Dynamic audience management linked to CRM status, such as ``excluding existing customers'' and ``stopping ads after MQL'', can be automated.
Lookalike's accuracy is determined by the quality of the seed. Regularly updating and using customer segments from the past 12 months as seeds is the key to continuous Lookalike improvement.
Different models are used depending on the evaluation purpose. Recognition measures are first touch, closing measures are last touch, and overall evaluation is linear - judgments are made from multiple perspectives.
Set "MQL conversion rate via advertisement", "Order acceptance rate via advertisement", and "LTV via advertisement" as the main KPIs. CTR and CPC are viewed as supplementary indicators.
Setting up Meta CAPI/Google Enhanced Conversions and strengthening first-party data—Proceed with preparations to protect measurement accuracy after cookies are abolished.