Sage Lewis does.

The president of Akron's SageRock.com swears by blogging as a marketing tool.

More people know what SageRock.com is. More search engines are attracted to its Web site. More clients see the company as an industry leader. And all of that, Lewis said, is because of the tech company's blog.

''It's really changing the face of what publishing and information awareness is to a company,'' Lewis said.

A blog is a journal that's publicly available online. Most are run by one person, but sometimes several people contribute.

Some are silly. Some are serious. Some are quite personal.

But for companies, blogs are an opportunity to tell clients and potential clients about your industry, products and services. And it doesn't matter how large or small your business is.

Blogs are a way to build an open relationship with customers, and make your company a resource on a particular subject. They're also good for spin.

''The first hurdle is convincing companies that it's a useful tool,'' said Debbie Weil, a business-blogging consultant based in Washington, D.C. ''It's not just some silly thing for personal use.''

The best blogs aren't blatant attempts at self-promotion but an informal conversation with opportunities for feedback. Blogs should be written with the reader in mind, with an eye toward helping and informing them.

At SageRock.com, for instance, employees post links to articles about trends in Internet use and search-engine marketing - the company's bread and butter.

Clients visit the blog to feel informed, Lewis said, and they see SageRock.com as the authority that distributes that information.

''If a person reads our Web site and recognizes us as an industry leader, it's not a matter of convincing them whether we'll do a good job or not,'' he said. ''It's usually a matter of whether our services can fit into their budget.''

The most important thing about a blog is the logistics.

''Blogging can be a great marketing tool if it's used in the right way,'' said Shirley Shriver, vice president of marketing services for Hitchcock Fleming & Associates in Akron.

The ''right way'' includes several things.

First, companies must commit to maintaining a blog.

It sounds obvious, but a blog that isn't updated at least once a week is useless. It also may take Web surfers a couple of months to notice it is there. Sure, running a blog takes time and resources, but a lot less than many employers may think.

Second, business owners have to decide who's going to write the blog. ''The more important the person is, the more popular it will be right away,'' said Barbara Payne, a Mayfield Heights, Ohio, blogging expert and writer who runs www.blogforbusiness.com.

High-level executives are ideal, but if that person can't string together enough words to form a sentence, don't bother. A poorly written blog won't win points with anybody.

Employers should be clear about the limits for the write. ''What are the boundaries? A company should think about what topic and how far they should go,'' said Steve Rucinski, a blogging expert and operator of www.smbceo.com.

Third, companies must decide how their blog will be written and what it will include.

At the very least, every business blog should be useful, have a point of view, have a way for readers to post feedback and include links to articles from other sources, said Weil, who also runs WordBiz.com.

All that is the hard part.

Literally creating a blog is relatively easy and ridiculously inexpensive. Often, it's free.

Several tools are available online at sites such as these:

http://www.blogger.com,

http://www.blog-city.com,

http://www.blogspot.com.

These Web sites offer templates for blogs, and in many cases, they work with your Web browser so you can update your blog with a couple of clicks.

''They're easy to use,'' SageRock.com's Lewis said. ''You don't have to have any technical background.''

Marketing a blog can be a little more complex. Many companies let users find them on their own. They either put a link to it on their Web site or let search engines such as Google and Yahoo! draw people in.

Search engines love new content, and just putting a blog on your Web site could push your company to the top of someone's search results.

Some blogging experts, however, recommend the more direct route of submitting a blog to a Really Simple Syndication feeder, such as these:

http://www.blogsearch1engine .com, http://www.bloglines .com, http://www.technorati.com.

Better known as RSS feeders, these sites are basically search engines for blogs.

Anyone who does a search for a topic on one of these sites will get summaries of and links to blogs. The rankings are based on the last time each blog was updated, and users can create a list of blogs they want to track.

That's great for blog cruisers, but for creators, be warned: Submitting a blog to a feeder isn't always easy.

Most of these Web sites require you to sign up for a free account and give you instructions from there. The first time you tackle RSS may take a while.

The how-tos aside, many companies are reluctant to start a blog no matter how easy it is to do and no matter how popular blogging is.

Twenty-seven percent of adult Web users read blogs, and 7 percent pen them, according to the Pew Internet and American Life Project.

The number of companies that write them, on the other hand, is minuscule.

The reason, Weil said, is that companies don't see a direct connection between blogging and profit. A blog is a long-term marketing tool aimed at getting customers to trust and understand your company. ''The goal is to evolve your relationship with customers,'' Rucinski said. ''How do you measure that?''

Also called a Weblog, is a publicly available online journal. Usually the work of one person, but sometimes several people contribute to a blog.

RSS

An acronym for Really Simple Syndication, is a format for providing brief summaries of and links to online content, such as a blog. Blog search engines, known as feeders, find these RSS summaries and list them for Web surfers.

http://blogwrite.blogs.com

http://www.smbceo.com

http://www.blogforbusiness.com

http://workerbeesblog.blogspot.com

The examples

http://www.sagerock.com/weblog/ index.html

http://fastlane.gmblogs.com/

http://blogs.sun.com/jonathan

The setup

http://www.blogger.com

http://www.blogspot.com

http://www.bloglines.com