The optimal frequency varies by industry, audience, and goals. Here are some factors to consider:
Industry Standards: Research typical email frequencies in your industry. For example, e-commerce businesses might send more frequent promotions than a B2B service provider. Audience Preferences: Collect feedback directly from your subscribers. Surveys and preference centers can help you understand how often they want to hear from you. Testing: Implement A/B testing to find the sweet spot. Test different frequencies and analyze metrics like open rates, click-through rates, and unsubscribe rates.