What is the Tangle used for in a network?

The Tangle is a unique technology that underpins IOTA, which is specifically designed for enabling light and feeless transactions. Unlike traditional blockchain structures, the Tangle utilizes a directed acyclic graph (DAG) architecture, allowing for transactions to be confirmed without the need for miners or transaction fees. Each transaction in the Tangle must validate two previous transactions, which helps to maintain the integrity of the network while also contributing to scalability.

This ability to conduct transactions without fees is particularly advantageous for microtransactions and Internet of Things (IoT) applications, where the cost of transactions could hinder usability. The Tangle's design allows for rapid confirmations and an increased volume of transactions as more users engage with the network, making it a suitable solution for scenarios such as machine-to-machine payments and data sharing between devices in IoT ecosystems.

Thus, the central role of the Tangle as described aligns perfectly with the concept of enabling light and feeless transactions, making it the correct answer to the question.