Tim Ash is author of the bestselling book Landing Page Optimization, and CEO of SiteTuners, a firm that specializes in improving website conversion rates through landing page diagnosis and redesign, conversion consulting, a/b and multivariate test plan creation, and client training/mentoring. A computer scientist and cognitive scientist by education (his PhD studies were in Neural Networks and Artificial Intelligence), Tim has developed an expertise in user-centered design, persuasion and understanding online behavior, and landing page testing. In the mid-1990s he became one of the early pioneers in the discipline of website conversion rate optimization.

Over the past 15 years, Tim has helped hundreds of US and international brands improve their web-based initiatives, including Canon, Google, Expedia, CBS, Sony Music, Facebook, Nestle, Verizon Wireless, Texas Instruments, Cisco, and Coach.

Tim is a highly-regarded keynote and conference presenter, and the chairperson of Conversion Conference - a worldwide conference series focused on improving online conversions. He has published hundreds of articles about website usability, best practices in landing page design and tactics to improve website conversion rates, and he is also a ClickZ columnist and the host of the Landing Page Optimization podcast on WebmasterRadio.fm.