Click Install –> Add Integration, then copy the Slack Webhook URL.
Navigate to the Datadog-Slack integration tile and paste the Webhook URL in the Slack Account Hook field. Also, add a Slack Account Name of your choice.
Click Update Configuration.
Add your Slack Channels to post to with their associated Slack Account:
If you would like to be notified for every comment on a graph, tick the check box Transfer all user comments by each channel. If this box is left unchecked, you must use the @slack-account_name-channel_name syntax in order for comments to be posted to Slack. You may use @slack-channel_name if you are only using one account or referring to the first account.