Magento 2.1.18 is the final 2.1.x release. After June 2019, Magento 2.1.x will no longer receive security patches, quality fixes, or documentation updates.
To maintain your site's performance, security, and PCI compliance, upgrade to the latest version of Magento.

Helpful resources

You can use the following resources at any time to help you with your Magento installation:

Quick reference (tutorial)—a quick tutorial to get your installation off the ground quickly
Roadmap (reference)—a detailed reference of all your installation and post-installation options
Flow diagram—a conceptual diagram to orient you to the installation process

Sep 6th, 2018