Opt-in Rate: The opt-in rate is the percentage of visitors who willingly choose to provide their personal information or subscribe to your marketing communications, such as newsletters or promotions, via an opt-in form on your website or landing page. It is calculated as the number of people who completed the opt-in form divided by the total number of visitors to your page, expressed as a percentage. A high opt-in rate typically indicates that your marketing materials and CTA (call to action) are effective in gaining potential customers' interest and trust.

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