Darlington Glossary

Digital advertising, explained simply.

Plain-English definitions for the Google Ads, Meta Ads, measurement and performance marketing terms that matter.

Use this glossary when you need the quick meaning of a term. When a topic needs more depth, we link to a full guide with examples, decisions and practical next steps.

All termsGoogle AdsMeta AdsMeasurementMarketing EconomicsSEO & AEO
Google Ads

Google Ads glossary

Google Ads

Search Impression Share

The percentage of eligible Search impressions your ads actually received.

Definitions first. Decisions second.

Glossary entries are intentionally concise. For deeper strategy, examples and implementation help, use the linked Darlington guides.