See the knowledgebase for CRM enrichment here:
https://knowledge.apollo.io/hc/en-us/articles/4413921630989-CRM-Enrichment-Overview
CRM Enrichment allows you to update and enrich the existing records in your CRM. Oftentimes, contact and account information is subject to change—companies undergo acquisition or open new offices; people change roles or move to new cities. CRM Enrichment allows you to more readily capture those changes and keep the data in your CRM and the data in Apollo in sync.
To automatically keep track of changes and stay up-to-date with the latest Contact and Account information, use the CRM Enrichment feature in Apollo.
