Click-to-Open Rate (CTOR) in Zoho Campaigns measures the percentage of email openers who clicked a link, calculated as (Unique Clicks / Unique Opens) × 100. By measuring clicks against opens rather than total sends, CTOR isolates the performance of your email body content independently of your subject line.
CTR combines subject line effectiveness and content effectiveness, making it hard to diagnose issues. CTOR assumes the subject line worked (the email was opened) and tests only whether the content was persuasive enough to generate a click. A high CTR but low CTOR suggests the subject line is strong but the email body disappoints.
B2B email CTOR typically ranges from 10-20%. Promotional emails often achieve higher CTOR than informational newsletters because the call to action is clearer. If your CTOR is below 5%, review your email layout, CTA placement, copy clarity, and offer relevance before sending the next campaign.
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