Here we present the exercise of determining the best time to send an email marketing campaign based on the analysis of click times . The idea is to see at what times the “upward” inflection points begin throughout the hours and days of activity after the campaign. This is the same exercise we did in the first practical case, but applied not to openings but to click behaviour. This will give us an idea of the activity habits of our database, and from there we can optimise the sending times. In this particular case, we launched the campaign on a Thursday at 5:00 p.m. In the diagram we have marked the most marked trend changes in red. The first change occurs at around 8:00 p.m. on Friday, between 8:00 and 9:00 a.m. and between 2:00 and 3:00 p.m. on Saturday, greater variability is perceived (weekend effect), with the same time slots as on Friday being those that obtain the highest number of clicks. From these three analyses, it can be concluded that, in the Spanish market and in a B2C context, the best times to launch an email marketing campaign are 8:00 a.m. and 2:00 p.m.