If you have more than one Site Collections and want to manage one
Enable SharePoint Publishing infrastructure under Site Collection
Enable Managed Navigation in site level
Go to Term store of site collection and configure Terms.
stite settings--site collection features--
Enable SharePoint Publishing infrastructure
site settings--navigation
you can find golbal navigation(Top) and current navigation(left)
select managed navigation option...
in the same page you can find "managed navigation term set"
click on create term set..
click ok
no if you go to home page..you will not see any links...
now we will add terms..then you wil see links
go to site settings
Click on term store management
you can find a group with name as site collection name
expand..
you will see one group...click on group
(you can create your own group...then select this group under site settings--navigation--"managed navigation term set")
right side you will see general tab
click on general tab
check "use this term set for site navigation". save
in the left side group right click..select create term. enter name and press enter
select term
in the right side you will see navigation tab
under navigation node type
select the radio button for simple link..
click on browse. select any page from pages library
save
now you will see top nav and left nav
you can repeat term creation ...
you can apply same page or different page for each term...
if you want to use this navigation in another site collection
Access Term Store in different Site collection
Copy the Site collection url of the term store which you want to access in different site.
Open term store of the target site collection
Ex:https://SP2013/MySiteCollection/_layouts/15/termstoremanager.aspx
Click on the Term set group under System
You can find: Site Collection Access
Paste the site collection url, which you want get term stores in this site collection