Intuition is your imagination. Imagination allows you to find patterns and create new concepts and ideas. Everyone can do everything to a certain degree. Ni is an organizing function, Ne is a gathering function. Everyone can do everything, but lead Ni people are more focused on organizing the patterns in their world and Ne leads are more excited about gathering new patterns. As Ne gathers patterns, Si organizes the information. As Ni organizes patterns, Se gathers more information. Ne doms browse websites often not knowing or caring what it is looking for. That's Si's job to organize it all together. Ni doms use their Se to keep gathering information about one thing at a time in a more focused manner. Your intuition is always on. Because Ni organizes, it often pops ideas into your head out of seemingly nowhere because Se has been doing its job of providing new information to organize into patterns and build a conjecture about, which is the aha moment people like to use for Ni. The videos below may help.