TikTok kills Custom Identity as brands must link verified accounts: TikTok phases out Custom Identity in early 2026, requiring all advertisers to link verified accounts through F.I.R.S.T. framework for campaign continuity and Spark Ads access. https://ppc.land/tiktok-kills-custom-identity-as-brands-must-link-verified-accounts/ #TikTok #DigitalMarketing #SocialMedia #Branding #Advertising