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.
Can I add groups to Shared Folders?
Yes, you can add user groups to Shared Folders along with individuals. To do this, simply create the Shared Folder as you normally would, and select the group you wish to add during the folder creation process. You will have to set up user groups beforehand for them to be available to be added to a group.