Marker is a free Chrome add-on developed by Nacho Brito. It falls under the category of browsers and specifically the subcategory of add-ons and tools. The program aims to make it easier to understand long articles by finding the most relevant phrases and highlighting them.

With Marker, you can simply click on the icon and watch it automatically highlight the important sentences in any text. This feature is particularly useful when you're faced with lengthy articles and want to quickly grasp the main points.

The highlight algorithm in Marker is powered by Artificial Intelligence, specifically the open-source implementation of the TextRank algorithm. It efficiently identifies the most important sentences to provide you with a clear and concise summary.

One of the notable advantages of Marker is that it works directly on your device, eliminating the need to send your data to an external server. This ensures your privacy and data security.

Overall, Marker is a valuable tool for anyone who frequently reads long articles and wants to save time by quickly identifying the key information. It's user-friendly, free to use, and compatible with most websites.