Lam says that Prioritizing is a means to identify what is more urgent and needs immediate attention, what can be done afterward and what is not a priority but needs to be completed anyway.
In other words, this step is for you to determine the order you're dealing with a series of items or tasks, according to their relative importance.
Source: StateUniversity.com, 2021.
I'll share a made-up list of tasks I need to accomplish with you to exemplify the process. As to follow the first step of the POSEC method, I'll present each task by priority.