Add to Chrome.
Click 'Add extension' above.
The installation process should take less than a minute.
Next, you'll Create an Account.
You might also find your answer in the LastPass Enterprise Manual.
How do I share a Secure Note in a Shared Folder?
To share a Secure Note in a shared folder, simply create the note as you normally would and drag and drop the note into the Shared Folder via the Local Vault. This will make the Secure Note available to anyone who has access to that particular Shared Folder.