In the education world, PLN stands for Personal Learning Network. What it means is that an individual has developed their own personalized "network" of fellow educators and resources who are designed to make them a better teacher. This network exists both in their real-life relationships and online through their social media connections.
With more and more opportunities to develop one's skills beyond what traditional routes have provided, establishing your own PLN is an essential step toward deepening your abilities as an educator. In the past, teachers were able to get connected to teaching resources through master's courses, education journals, conferences, professional development, and other similar activities. Each of these were and still are excellent ways to broaden your knowledge and skills in education. However, because each of these requires your physical presence and procurement of physical materials, they also come with certain restrictions.