Frequency is the average number of times each person in your audience has seen your ad. It's calculated as Impressions ÷ Reach.
Monitor frequency to avoid creative fatigue.
Frequency is how many times the average person in your audience sees your ad. Too low and people won't remember you; too high and you waste budget on ad fatigue. Managing frequency is critical for balancing awareness building with cost efficiency — especially in retargeting campaigns where audiences are smaller.