To give a marketing partner access to Google Tag Manager, sign in at tagmanager.google.com, open Admin, choose User Management, and invite their email with Publish permission on your container. Publish is what lets them actually install and fix your tracking. Your password stays with you.
Quick translation: Tag Manager is the toolbox that holds your website's tracking. Instead of pasting code into your site for every tool, everything lives in one container that can be updated without touching the site itself.
Do I even have Tag Manager?
Go to tagmanager.google.com and sign in
Use your business Google account.
Look for a container
If you see your website listed with an ID that starts with GTM, you have it. If Google asks you to create an account, you do not, at least not under this login.
Ask whoever built your site
Tag Manager is often created by a web designer. If you believe your site has it but you cannot see it, ask which account it lives under, and get your email added as an Administrator while you are at it.
How do I add my marketing partner?
Open Admin
With your container selected, click Admin at the top of the screen.
Open User Management
You will see it twice, once under the account column and once under the container column. Start with the account column, it lets you set both in one pass.
Add their email
Click the add button, choose Add users, and enter the address your partner gave you.
Set account access to User
User is the basic level, it just lets them into the account. Admin at the account level manages people, and that stays with you.
Set container permission to Publish, then invite
Choose Publish for your website's container and send the invite. They accept by email and can get to work.
Why Publish, and is it safe?
Container permissions come in steps: Read can look, Edit can build but not release, Approve can prepare changes, and Publish can make them live. A partner installing tracking needs Publish. Anything less and they build things that never go live, then have to ask you to press the button every time.
Is it safe? Publishing changes what runs on your website, so treat it like handing over real tools: only to someone you hired. The safety net is solid, every published change is saved as a numbered version with a record of what changed, and you can roll back with one click.
Never share your Google password. Tag Manager access is granted by email invite with its own permission level. Keep account level Admin inside your business, and the container stays yours no matter who works in it.
Every website we build ships with tracking wired in from day one, so guides like this one take care of themselves. See how we build: website design for the trades.
