NL2 is characterized by a large number of weak players. Most players make trivial mathematical errors. Often they "pull" the draw not at
odds and outplay the
hands of average strength.
Weak players often call 3bet without a position, having no idea about the range and a clear plan for the distribution. 4 bet in such fields from unknown players almost always means "monster". Blind players play too many garbage hands and have an unbalanced range and restyl sizing.
Regulars gravitate toward an overly tight game, trying to find easy solutions against recreational gamblers. Their inflated fold on 3bet and passivity on the post-flop leaves room for exploitation.
The main field of NL2 are beginners, novice regulars and hobby players. Based on this, it is worth noting the general tendency of the field to tilt. This feature is very easy to exploit for your profit. By narrowing your range and including in the draw such tricks as slowing monsters and provoking bluffs, you can get full payment from the players in tilt.