The "Bab 3.1" (Chapter 3.1) of this guide typically focuses on character progression and mastery. Based on related community guides and tutorials, Bab 3.1: Character Mastery and Ultimate Attacks
Which are you playing (e.g., Demon Slayer , Genshin Impact )?
If you were looking for a formal research paper on "Social Gaming" rather than a game guide, you might be interested in Social Gaming: A Systematic Review , which also contains a Section 3.1 regarding research methodologies in the gaming industry.