Guest posting occupies uncomfortable ground. Writing genuinely useful articles for publications your customers read is ordinary public relations and always has been. Paying a broker for placements on sites that exist to sell links is something else, and Google's own documentation treats it as link spam rather than as a grey area. The difficulty for a buyer is that both are sold with the same vocabulary, the same metrics and often by the same vendor. This page is about telling them apart, understanding what you are risking, and asking the questions that make a vendor's answer verifiable rather than reassuring.
Where the line actually sits
Google's spam policies describe link spam explicitly, and among the examples are exchanging money for links or for posts that contain links, and using automatically generated or low value articles largely to embed links. The guidance also covers what to do when a link is promotional in nature, which is to qualify it so it is not treated as a plain endorsement. Read that as a buyer and the practical test becomes clear: if money changed hands for the placement and the link is not qualified, the vendor is selling something the search engine has published a policy against. That does not mean everyone doing it is penalised tomorrow, and vendors will tell you as much. It means you are buying an asset with a known policy risk attached, and you should price it accordingly rather than pretend the risk is not there. The honest version of this trade exists too: pitching a genuinely good article to a publication that would run it on merit, with no payment, is not what the policy targets.
How to inspect a placement before you buy it
Never buy from a list of metrics alone. Ask for the actual site and open it. Does it have a coherent editorial identity, or is it a general interest blog covering finance, dentistry, gambling and travel in the same week. Does it have real readers, evidenced by anything other than a third party authority score. Look at the last twenty published posts: if most are thinly written pieces from unrelated industries each carrying an outbound link to a commercial site, you are looking at a placement farm and so is Google. Check whether the site discloses sponsored content, and check whether existing guest posts carry qualification on their links. Then ask the vendor a direct question: is a fee paid to the publisher for this placement, and if so, how is the link marked. Vendors who answer clearly can be evaluated. Vendors who describe an outreach relationship without answering the payment question have answered it.
What it costs, and what the money is really buying
Placement pricing in this market is set almost entirely by the vendor's cost of acquiring the placement plus a margin, and the third party authority metrics used to justify tiers are estimates produced by tool vendors rather than measurements of anything Google uses. That has two consequences for a buyer. First, comparing vendors on price per metric point is comparing on a number nobody at a search engine has ever seen. Second, the cheapest placements are cheap because the publisher will accept anything, which is exactly the property that makes a link worthless. If you are going to spend here, spend on fewer, better placements on sites where a customer might genuinely read the article, and judge the result by referral traffic and enquiries as well as by any ranking movement. Agencies vary widely in how they source this work, so when comparing link building agencies, ask each one what proportion of placements involve a payment to the publisher. The distribution of answers is more informative than any pitch.
Safer alternatives that vendors rarely lead with
Before buying placements, exhaust the routes that carry no policy risk. Original research or a dataset from your own business is the most reliable, because journalists and industry publications cite things nobody else has. Genuine expert commentary, offered to publications and reporters who are actively looking for sources, produces links that were earned editorially. Trade association membership pages, supplier and partner directories, sponsorships of things you actually sponsor, and local institutions all produce legitimate references. Fixing the pages people would want to link to is unglamorous and usually more valuable than any campaign. Ask any vendor pitching guest posts what they would do for you that does not involve buying a placement. A firm with real range will have several answers. A firm with one product will explain why the alternatives are slow, which is true, and will not mention that they are also durable.
Questions people ask about guest post link building
Will buying guest posts get our site penalised?
It might, and more commonly the links are simply discounted so the money bought nothing. Google's spam policies name paid links and articles published mainly to carry links, so treat any purchased placement as carrying policy risk. Decide the risk consciously rather than accepting a vendor's assurance that everyone does it.
How do we judge whether links are working at all?
Look for movement on the specific pages the links point to over a period of months, alongside referral visits and any enquiries from those sources. If a campaign produces nothing but a spreadsheet of placements and no measurable change anywhere, you have bought inventory. Agree in advance what evidence would justify continuing.
What should we require in a contract?
A list of target sites approved by you before publication, a written statement of whether any payment reaches the publisher, replacement or refund if a placement is removed within a defined period, and confirmation that no automated content is used. Also require the anchor text be agreed, since aggressive commercial anchors raise risk further.
Is digital public relations the same thing?
It overlaps but the sourcing differs. Digital public relations earns coverage on merit, usually with research, data or expert commentary, and the links follow. It is slower and less predictable in volume, and the resulting references tend to be on sites with actual readers, which is the property that makes them hold value.