Since we will be using Slack in this recipe, you will need to have a Slack account. If you do not have one, you can sign up for a free account at https://slack.com.
The integration requires the Jira Server for Slack (Official) app, which is the official app from Atlassian. You can get the app from https://marketplace.atlassian.com/apps/1220099/jira-server-for-slack-official.