The Processing API (or shortly "Process API") is the most commonly used API in Sentinel Hub as it provides images based on satellite data. Users can request raw satellite data, simple band combinations such as false colour composites, calculations of simple remote sensing indices like NDVI, or more advanced processing such as calculation of Leaf area index (LAI).
Even though satellite imagery data are often distributed in "tiles", we do not want users to be limited to these. Tiles are an artificially introduced entity to make data distribution easier to handle. However, users should not have to care about whether their AOI is on one tile or another, or perhaps on the border of two tiles. This is why Sentinel Hub API hides this complexity and simply makes the data available over chosen area of interest and temporal period of interest. Tiles are therefore automatically stitched together based on defined parameters (AOI, time period, cloud coverage, priority, etc., depending on the data type).
We have prepared a Processing API webinar to help you get started.