Bobby Newmark is a character in the book "Count Zero" by William Gibson. He is a young guy who likes to hang out in the matrix, which is like a big virtual world that people can access with computers.
Bobby is a bit of a newbie in the matrix, so he doesn't know everything yet. He's also not very good at protecting himself from other people who might try to do bad things to him in there.
But despite all that, Bobby has a lot of potential. He's kind of like a little kid who is just starting to explore a new playground. He's excited and curious, but he also needs to be careful not to get hurt.
Overall, Bobby is a very interesting character who shows us what it's like to be a young, inexperienced hacker in a world where technology is everything.