Solution #1:
Watch this screencast to setup Google AdWords Remarketing in Google Tag Manager.

Follow this guide to Create Audiences segment and Adword Remarketing campaign
Solution #2 (Recommend)
Google Universal Analytics also support AdWords Remarketing.
If you have setup User-definded variable in previous guide.
- Step 1: Enable Remarketing in Analytics
- Step 2: Create audiences
- Step 3: Use your Remarketing Audiences in AdWords
Watch this screencast to setup Google AdWords Remarketing in Google Tag Manager.

Follow this guide to Create Audiences segment and Adword Remarketing campaign
Solution #2 (Recommend)
Google Universal Analytics also support AdWords Remarketing.
If you have setup User-definded variable in previous guide.
- Step 1: Enable Remarketing in Analytics
- Step 2: Create audiences
- Step 3: Use your Remarketing Audiences in AdWords
Published on: 06 / 13 / 2019