Here are the six steps to achieve the managed navigation on site.

What is Managed Navigation?

Steps:

Here are the steps to map the managed navigation on site,

Step 1: Go to your SharePoint site.

Share Point site

Step 2: Then select “Site settings” from your gear menu.

Site Settings

Step 3: On the Site Settings page, select the “Navigation” from "Look and Feel" section as in the following screenshot:

Navigation

Step 4: Select the Managed Navigation from “Global Navigation” in Navigation Settings page.

Managed Navigation

Step 5: Select the term set which you want to map from “Managed Navigation: Term set
Ok

Step 6: Finally click “Ok” to save the navigation settings.

mapped

Successful term sets will be mapped to your site collection.

site collection

And also you can create multilevel navigation using term set.

test
Limitation

Summary

In this article we explored how to use the managed navigation in SharePoint online sites.