A data hygiene audit is a systematic review process that checks CRM data for errors, inconsistencies, duplicates, and outdated information. Regular audits help organizations maintain data accuracy, improve CRM efficiency, and ensure compliance with industry regulations. Auditing techniques include automated validation checks, deduplication processes, and manual data reviews. For example, a CRM hygiene audit might flag multiple customer records with the same email address, prompting a merge to eliminate redundancy. By conducting frequent data hygiene audits, businesses can enhance lead quality, streamline marketing campaigns, and optimize sales performance.