A Twitter X Ads terminology guide for media buyers removes the friction of navigating X's evolving advertising ecosystem. As the platform continues to shift its monetization features and interface language, media buyers face confusion around core concepts, bidding mechanics, and audience targeting options that directly impact campaign performance. This glossary covers 70 essential terms including impression-based metrics, conversion tracking definitions, audience segmentation types, and platform-specific features like Communities and premium placements that shape modern X advertising strategy. Whether you're managing direct response campaigns, brand awareness initiatives, or engagement-focused buys, understanding this shared vocabulary ensures clearer communication with team members, clients, and X account representatives.