In digital marketing context, a branding campaign is an advertising campaign for which visits, leads, conversions or other forms of immediate direct responses are not the priority.
The goals of a branding advertising campaign are to favorably develop brand image and awareness.
Branding campaigns are the more common form of campaigns on traditional (offline) advertising media but are not dominant on digital media.
Brand campaign success can be measured by traditional post-campaign surveys, by ad engagementor brand queries trends on search engines.
Source: Digital Marketing