A tech mentor's role in startups involves providing guidance, expertise, and support to entrepreneurs as they navigate the challenges of building their businesses. Mentors share their experience in areas such as product development, lead generation, and fundraising, helping startups make informed decisions. They also foster networking opportunities by connecting entrepreneurs with industry contacts and resources. A mentor can assist in problem-solving, contributing valuable insights on strategy and execution. Overall, tech mentors play a crucial part in enhancing a startup's potential for success and reducing the likelihood of failure through their advice and encouragement.