Success in daily updates can be measured through various metrics: - Open Rates: Indicates how many of your subscribers are opening your emails. - Click-Through Rates (CTR): Shows the percentage of recipients who clicked on links within your email. - Conversion Rates: Measures how many recipients took the desired action after clicking on your email. - Unsubscribe Rates: A low unsubscribe rate indicates that your audience is still interested in your updates.