Citation share is the GEO analogue of share of voice, but at the link level rather than the mention level. A team with 30% citation share on a defined prompt set is the source AI engines reach for in three out of ten cited links. Competitors with higher citation share are pulling the model toward their content; the GEO playbook is to close that gap by publishing more answer-shaped content the model can verify.
GEO glossary
Citation share
Citation share is the percentage of source links inside AI-generated answers that point to a given domain, measured against all citations across direct competitors.