Household Reach
Part of CTV campaign measurement
Household reach versus individual viewers
Learn what household and individual CTV reach estimates count, how co-viewing affects them and what to check before comparing reports.
Household reach estimates the number of homes a campaign reached. Individual reach estimates people under a supplier’s identity and modelling method. Neither figure identifies everyone who was in front of a shared television. Choose the unit that answers your question, then label it in every forecast and report.
Know what each unit represents
A TV device is equipment, an account may be shared, and a household may have several devices and people. One CTV impression on a lounge-room screen does not reveal whether one person, several people or nobody watched attentively. Applying an assumed household size cannot turn impressions into individual viewers.
For an Australian advertiser interested in coverage of homes in a service area, estimated household reach may be the useful unit. If the question concerns people in a demographic group, an individual estimate may be more relevant, provided the supplier explains its model and coverage. Household reach alone does not establish demographic reach.
Household reach estimates homes, while individual reach estimates people. Co-viewing may affect estimated audience counts. These are distinct modelled outputs, not observed counts of the people in each room.
Household Reach vs Individual Reach: Key Differences for Australian CTV Campaigns
- What it measures
- Number of unique homes reached
- Unit of measurement
- Households (not individuals)
- Assumes co-viewing?
- Yes – modelled, not observed
- Best for
- Measuring coverage across Australian households in a target area
- Limitation
- Does not identify individual viewers or demographics
- What it measures
- Number of unique people modelled across devices and accounts
- Unit of measurement
- Individual people (modelled)
- Assumes co-viewing?
- Yes – based on supplier’s modelling method
- Limitation
- Depends on supplier’s identity resolution and data quality
Check the definition before comparing reports
Ask each supplier:
- Does the figure refer to devices, accounts, households or modelled people?
- Is it based on served impressions, viewable impressions or another event?
- Which apps, devices, Australian locations and dates are included?
- Is co-viewing modelled, and how are people using several devices counted?
- Which delivery is excluded because it cannot be measured or modelled?
- When will the estimate be available, and can small report cuts be suppressed?
Co-viewing estimates should not be read as direct observation of every viewer in a room. Availability and timing can vary by supplier and report.
Avoid false totals across sellers
If two publishers each report unique households, some homes may appear in both reports. Ask whether a combined estimate accounts for that overlap and what delivery it covers. If no such method exists, keep separate publisher figures and label campaign-wide overlap unknown.
Match reporting periods as well. Weekly reach and campaign-long reach answer different questions, and weekly unique figures cannot simply be added to produce a campaign total. Do not treat an unsettled day as a fall in reach.
A useful final statement names the estimate, unit, dates, inventory and exclusions: “Estimated household reach across the measured inventory was …” or “Modelled individual reach was …”. The figure then states what the method can support, without claiming to identify particular viewers.
Key Considerations for CTV Reach Reporting in Australia
- Overlap between publishers
- Unknown unless combined estimates account for it
- Reporting period alignment
- Must match (e.g., weekly vs campaign-long)
- Do not sum weekly reach figures
- Can lead to inflated totals
- Unsettled days
- Should not be treated as a drop in reach
- Final reporting statement example
- Estimated household reach across measured inventory was …
