If you are in business and aren’t on LinkedIn, Facebook, Twitter, Flickr, or YouTube, you could be losing business.

Find out how to use social media tools in your business through three new noncredit courses focusing on social media networking for the small business person being offered this fall through Northern Essex Community College’s Work Force Development and Community Education Division at the Riverwalk, 360 Merrimack St., in Lawrence.

Social Networking 101 for Business is a one-day workshop offered on Saturday, Oct. 1, from 9 a.m. to 2:30 p.m. Taught by Ari Herzog, consultant, professional speaker, and blogger on new and emerging media. The cost is $95.

A four-week course titled Marketing Your Business Using Social Media will be held Thursdays from 6:30 to 9 p.m., Oct. 13 through Nov. 3. Also taught by Herzog, the cost is $189.

Successful Public Relations Strategies for the Small Business, taught by Andrew Rodger, a public relations professional with Matter Communications in Newburyport, will be held Saturdays from 9 a.m. to 3 p.m. Oct. 15 and 22. The cost is $189.

To view all noncredit courses visit https://www.necc.mass.edu/academics/courses-programs/non-credit/

To register, call 978-556-3700. For questions or company paid registrations call 978-659-1200.