After working at Google for five and a half years, Raiza Martin, the leader of the NotebookLM team, announced her resignation on the social platform LinkedIn to prepare for a new startup project. In her farewell letter, she expressed pride in NotebookLM, stating that it has evolved from its initial concept to a product that is now used by millions of users. Raiza Martin thanked everyone who supported NotebookLM, particularly highlighting the feedback from early users as vital to the product.