This document provides an overview of the lifecycle of e-resources, including their meaning, types, and the process of managing them. It discusses the challenges libraries face in acquiring and providing access to e-resources compared to print materials. The lifecycle of an e-resource includes stages like discovery, trial, selection, acquisition, access, and deciding to renew or cancel. Effective management of e-resources requires the use of resource management systems and involves investigating, acquiring, implementing, evaluating, and reviewing software. Policies for acquiring and developing e-resource collections also go through goal setting, environmental scanning, strategy development, implementation, and evaluation.