The article discusses the optimal timing for sending emails based on research from various studies. It highlights that the best days to send emails in 2023 are Thursday, Tuesday, and Wednesday, while the worst days are Saturday and Sunday. The best times to send emails are 10 a.m., 9 a.m., 8 a.m., 1 p.m., and 3 p.m. The article emphasizes the importance of considering your audience and industry when determining the best times and days to send emails. It also provides tips on crafting effective email subject lines and suggests using data-driven strategies to test and measure the success of different send times and days.