Kibana's new time series visual builder is an innovative UI designed to enhance the visualization and analysis of time series data by leveraging Elasticsearch's pipeline aggregations. This tool allows users to create and customize dashboards with features such as trend analysis of multiple index patterns, complex calculations using metric and pipeline aggregations, and conditional coloring based on user-defined thresholds. Users can also compare data across different timeframes, switch between various visualization types, and add annotations to trend charts. The visual builder is part of a series of blog posts and video tutorials aimed at helping users get started, with feedback encouraged to improve its experimental features.