The Vercel Analytics team has released improved accuracy for their charts, making it easier to visualize trends over time. The previous visualization method connected all data points as a line, which was noisy and difficult to read. A new approach uses a smooth curve to represent the overall trend of the data, reducing noise and improving readability. This involves using a best fit line to show the graph's trend at a glance. To achieve this, the team used curve fitting, specifically linear regression, to find the best fit for the data. They also implemented an adaptive approach, where they split the data into training and test sets, and calculated the error using the Mean Squared Error (MSE) value. This ensures that the curve is not overfitting or underfitting, providing a good fit for the entire dataset. The new change can be enabled by visiting the Analytics tab in the project dashboard or trying it free with a team on Vercel Pro.