Dataflash is an "omnibus survey" which specializes in trade fairs or commercial events organized by several sponsors, such as Salão do Automóvel.
The main advantages of this service are:
- Interviewees show greater willingness to answer questions because they are in their own environment;
- Geographical concentration: the customer can target a public that is concentrated in the same location. As a result, costs will be reduced.


- Visitors, who have circulated on the premises for at least an hour, are approached randomly everyday during the fair/event;
- During specific questioning about booths, the interviewee must not be able to actually see the booth which is being evaluated;
- At the customer's request, interviews can be conducted by using laptops (CAPI interviews) inside the booth which is being evaluated.