Short answers, pulled from the story.
Serena Williams won 23 major women's singles titles, the most of the Open Era and the second most of all time. Her 23rd came at the 2017 Australian Open, surpassing Steffi Graf's Open Era record.
Serena Williams was coached by her parents, Richard Williams and Oracene Price, alongside her elder sister Venus. Richard home schooled both girls and later took over their coaching entirely after pulling them from Rick Macci's tennis academy in 1995.
The Serena Slam refers to Williams winning all four major singles titles in a row without doing so in a single calendar year, first from the 2002 French Open through the 2003 Australian Open, and again from 2014 to 2015. She beat her sister Venus in the final each time during the first Serena Slam.
Serena Williams played her final professional match at the 2022 US Open, losing to Ajla Tomljanović in the third round. She had announced her plans to evolve away from tennis in the September 2022 issue of Vogue.
Umpire Carlos Ramos issued Williams a code violation for receiving coaching signals from her coach Patrick Mouratoglou, who later admitted he had been coaching. Two further violations for racket abuse and verbal abuse cost her a point and a game, and she was fined $17,000 total.
Serena Williams won four Olympic gold medals, three of them in women's doubles alongside her sister Venus, an all time joint record in tennis. She and Venus are the only women in the Open Era to win Olympic gold in both singles and doubles.