Linkit provides an enriched linking experience for internal and external linking with editors by using an autocomplete field. Linkit has by default support for nodes, users, taxonomy terms, files, comments and basic support for all types of entities that defines a canonical link template.
After the installation, you have to create a Linkit profile. The profile will
contain information about which plugins to use.
Profiles can be created at /admin/config/content/linkit
When you have created a profile, you need to enable the Linkit plugin on the
text format you want to use. Formats are found at
admin/config/content/formats
.
There are plugin implementation examples in the linkit_test module bundled with Linkit core.