Ad buying option in which ad placements may appear on any pages of a target site.
In run of site advertising, advertisers generally give up say over placement in return for low rates and broad reach. Ads may be placed randomly in unsold, less valuable portions of the target site.
Run-of-site is similar to run to network, except the ads appear on an individual site instead of many sites.
see also: Digital Marketing Tools
Display Advertising Stats 2017: SEMrush Study
SEMrush (September 13, 2017) sponsored
Beyond Run of Site
ClickZ (October 11, 2001)