This depends on your advertising goals as well as the daily budget you want to allocate to the campaign. For example, you may seek to create more of a “top-of-the-funnel” campaign in which you would target more accounts than a “middle-of-the-funnel” campaign or a campaign including accounts considered to be in a stage deeper within the buyer’s journey.
Further, you do not want to include so many companies to the extent where the ad spend cannot be spread to effectively reach and serve impressions to all individuals across target accounts.
We set a maximum threshold of 500 companies per tactic to ensure your campaign performs optimally. Further, our philosophy is - the more targeted, the better!