Guest posting means writing content that is published on someone else's site, usually with a byline and a short bio. Done well, it puts your expertise in front of an established audience and builds relationships with publications in your market. Google's spam policies warn against large-scale guest posting campaigns with keyword-rich anchor links, so the purpose and the scale of the work decide whether it is healthy.
What good guest posting looks like
The best guest posts are pieces the host publication would be glad to have even without any link. They come from someone with real experience, cover something the host's readers care about, and fit the site's editorial standards. Links, if any, are there because they help the reader.
- A practitioner writing a deep how-to for a respected trade blog
- A founder contributing an opinion piece to an industry publication
- An engineer writing about a hard technical problem for a developer community
Where it goes wrong
Guest posting turns into link spam when the article exists mainly to carry a link: thin content placed on sites that accept anyone, often for a fee, with keyword-rich anchors pointing to commercial pages. Google has described large-scale article and guest posting campaigns of this kind as link schemes and has said links in them may be treated as unnatural.
Many publishers now apply nofollow or sponsored to links in contributed content. That is a reasonable choice for them, and it means guest posting should be judged mainly on audience and reputation.
Practical guidelines
Pick publications your buyers actually read. Pitch topics the editor will value. Use brand or natural anchors, and link to useful resources rather than money pages. Measure referral traffic, sign-ups and follow-on opportunities instead of counting links.
Example
A guest post with real reach
The head of security at an illustrative identity platform, Keystrand, writes a detailed incident response checklist for a well-known security engineering blog. The editor keeps one link to Keystrand's open-source audit tool where it fits the checklist. The post brings in practitioners who try the tool, and two conference organizers invite the author to speak.
Common mistakes
Writing for any site that accepts posts
Sites that publish anyone's article usually have little audience and often sell links on the side.
Packing in exact-match anchors
Commercial keyword anchors in guest posts are a pattern Google specifically calls out.
Questions
As a volume link tactic it carries policy risk and diminishing returns. As a way to reach audiences and build reputation, it remains a normal part of content marketing.
Yes. If the audience is right, the post is worth writing either way.