Conversion is the ultimate goal of marketing campaigns, and achieving it requires great campaigns that can be quickly launched to keep up with changing circumstances. Traditional marketing approaches often result in irrelevant campaigns by launch day due to the rapid pace of change in the world. Using a monolith architecture can make it difficult to adjust campaigns mid-flight, leading to long launch times and reduced flexibility. In contrast, using web technologies allows for faster ideation-to-execution time, enabling marketers to quickly respond to changes and optimize their campaigns for relevance. This is exemplified by Gatsby co-founder Sam Bhagwat's experience with a 5-week campaign that transformed the user experience, highlighting the importance of web development speed in driving successful marketing outcomes.