Poo Kuan Hoong gives a presentation on building effective machine learning models with LightGBM. He begins with an introduction to decision trees and ensemble methods like gradient boosting. He explains that LightGBM is a gradient boosting framework that is faster and more accurate than other algorithms. It grows trees vertically rather than horizontally for increased speed and accuracy. Tips are provided for fine-tuning LightGBM like adjusting the number of leaves, learning rate, and using techniques like bagging and feature sub-sampling. A demo is then shown on a Kaggle dataset to predict safe drivers.