Google+ Building Targeted Circles

You can also find Google+ users from within your niche market by
exploring Google+ directory sites, including: http://www.gglpls.com/

Browse By Users
With GGL Pls, you can browse Google+ users by tags, locations and categories. For example, if you were interested in finding people who were interested in marketing, you would click “Marketing” from the list of available tags in the left hand navigation menu as shown below:

You can add your Google+ profile link to this directory and assign tags to it to help people find you. You can add up to 3 tags to your GGLPLS.com profile:

Choose your tags carefully, as they will help other like-minded individuals find you! In my example, I am focusing on business contacts and people who are interested in work at home, marketing and blogging.
You can edit your tags at any time by logging into your gglpls.com account and editing your profile box.
Click “List yourself in the Google+ directory” link at the very top of the page to add your profile into this ever-growing directory.
You can also download a free Google+ widget that lets you add your Google+ profile box to any website or blog that you own.
In order for your profile to appear within the directory, you will want to make sure that you’ve allowed “Anyone on the web” to see your Google+ profile. To do this, log into your Google+ account and click “Edit Profile”.
You can assign different viewing permissions to every part of your Google+ profile, so begin by clicking on each area and making sure that you’ve selected “Anyone on the web” as shown below:
Privacy settings works the same way for all of your circles and updates as well, so once you’ve created a few different circles and you’ve begun to add contacts, you can assign different settings for each groups of contacts, such as allowing only those within circles to see specific updates, anyone on the web, or only you for personal notes that you don’t want to make public.