Twitter has added a new control option for marketers by making frequency capping available for all campaign types globally.
As explained by Twitter:
"Marketers know one key component of campaign success is effective audience reach. That’s why we are introducing frequency caps for ads on Twitter globally. Whether it’s brand lift or offline sales impact, frequency caps allow advertisers to optimize campaigns to deliver efficient business outcomes through better control over impression delivery and audience reach over extended periods of time."
Frequency capping enables you to set a limit on how many times each user is shown your ad within a given time frame.