I just checked out this package and I must admit the readme is a somewhat incomplete. I've submitted a PR adding a section on the usage in the views.
After you've followed the setup instructions, you can use the package as follows:
Given you have a route to show a specific items in your web.php:
Route::get('items/{item}', 'ItemController@show')->name('items.show');
To generate a URL to a certain item, you can use the following code in your view:
{{ route('items.show', Item::first()) }}
This generates a link to 'items/{hash}' where the "hash" is translated to the corresponding ID. This way, an item with an ID of 1 can have a link /items/579747662. In that way, users of your application do not get information on how many items there are and cannot guess the next / previous entries.