Description: Figure size defines the dimensions of the figure in Matplotlib, a data visualization library in Python. This parameter is crucial for the effective presentation of graphs, as it determines the space that the figure will occupy on the screen or in an output file. The dimensions are specified in inches and can be adjusted to suit different visualization needs, such as data clarity, label readability, and the overall aesthetics of the graph. An appropriate figure size can enhance the understanding of the information presented, allowing details to be more visible and relationships between data to be more evident. Additionally, figure size can influence print quality and how graphs are displayed on different devices. In many data visualization libraries, figure size is set using a parameter when creating a new figure, allowing users to customize their graphs according to their specific preferences and requirements. In summary, figure size is a fundamental aspect of creating effective visualizations, as it affects both the presentation and interpretation of data.