Very carefully.
First and foremost, do not let the other person give you their login credentials. If they do, don't use them. Doing that will result in a suspended membership. That will cause both of you all kinds of problems and misery (including but not limited to a $50 surcharge) without helping anybody.
That means that to help someone else with our service, you're going to need a (free) membership of your own. There are two fundamental reasons for this:
When you go to the signup page, you'll see bold print warnings that memberships are created for individuals (not companies or organizations) and that they may not be created for others, transferred, or shared. Make sure you heed those warnings. If you don't: suspended → problems and misery → nobody helped.
Creating your own membership will allow you to look around our system and make sure that you're familiar with the features and limitations of our service and that you're comfortable that you can provide the necessary help.
With that out of the way, there are three main ways to help members of our service.
If the person only needs help managing website content, adjunct access allows them to let you access their site's content. There's no fee; you can create a membership and be given adjunct access to another person's site without ever paying anything.
Accounts can be shared between multiple memberships. This is the best way to organize group projects or situations where one person is doing the technical work and another is paying the bills.
If it's best for you to take over completely, the other person can permanently transfer individual assets, a whole account, or the entire contents of their membership to you.
Due to our privacy policy, we will not discuss the details of another person's membership with you without their express written consent provided by them through our site.