Why it matters
TXT records matter in two places. First, services such as Google, marketplaces and escrow tools ask you to add a TXT value to prove you control a domain. Second, email authentication uses TXT records. A seller can use a verification TXT record to prove ownership to a buyer without sharing account access. A common mistake is deleting old TXT records during cleanup. That can break email delivery or lock out a verified service.
Source: cloudflare.com