Here's how you can make your outreach strategy more effective with pre-targeting:
Create a custom audience made up with you target accounts - best ad platforms for this are LinkedIn and Twitter as they allow for the most precise targeting (LinkedIn by company name and Twitter by user's handle) - you can even use them both at the same time
Run ads targeted at these audiences to build initial brand awareness (optimize for reach)
Only after your target audience has been seeing your ads for a couple of days/weeks, start your outreach campaign
Why does it work? Mere exposure effect - people prefer things they're familiar with. When you reach out to them after the pre-targeting campaign, your company is no longer unknown to them.