In this episode of the Within WordPress podcast, Leslie Sim shares her journey from being new to WordPress to building Newsletter Glue, a plugin that simplifies the process of creating and sending newsletters from a WordPress site. Leslie started in 2016 by building websites using WordPress for her digital marketing agency. However, she eventually felt burnt out and decided to shift her focus to plugin development. She met her co-founder and together they created a membership plugin, which later pivoted into Newsletter Glue. Through extensive customer research and feedback, Leslie narrowed down her target audience to medium to large publishers and focused on meeting their specific needs. She highlights the supportive nature of the WordPress community and discusses upcoming developments for Newsletter Glue, including rebuilding core WordPress blocks and introducing multiple newsletters. Overall, Leslie's story demonstrates the importance of customer-centricity and constant iteration in building a successful WordPress product.