Corrections, questions, and suggestions are welcome. If something on this site is wrong, out of date, or missing an important qualification, we would rather hear about it than not. This site publishes on subjects that change — search behaviour, advertising platforms, analytics tools, and privacy regulation all move — and readers who work in these areas are often the first to notice when a page has fallen behind.
You can also email [email protected] directly.
Corrections and factual disputes
If you believe a statement on this site is inaccurate, the most useful message identifies the page, quotes the sentence, and says what the correct position is and how you know. Where a correction is supported, the page is amended and the change is made silently unless the error was material, in which case it is noted. Where a claim on this site is contested rather than simply wrong, the page is usually updated to say so and to present both positions, because that is more useful to a reader than picking a side.
Several pages here deliberately decline to repeat statistics that circulate widely in business-to-business marketing but cannot be traced to a retrievable source. If you have the original methodology for one of them, that is a genuinely valuable message to send.
Consulting and expert witness enquiries
This site is published by Hartzer Consulting. Enquiries about technical SEO audits, website and domain migrations, search engine marketing programmes, domain name matters, or expert witness engagements are best sent with a short description of the situation, the timeline, and any deadline you are working to.
For an expert witness matter, the useful first message states the parties, the jurisdiction and forum, the technical question at issue, and the operative deadlines — a report date, a discovery cut-off, or a hearing. A conflicts check has to happen before anything substantive is discussed, so please include the names of the parties even in a preliminary enquiry.
For a migration or recovery matter, say what changed, when it changed, and what you have measured since. If traffic or rankings have already fallen, the most valuable information is the launch date and whether a redirect map exists.
Press, comment, and speaking
For comment on search engines, online advertising, web analytics, or domain names, put your deadline in the first line of the message so it can be prioritised appropriately. Please say whether you need background, an on-the-record quotation, or a technical explanation you can attribute.
Citing and republishing this material
Quoting from this site with attribution and a link is welcome, and no permission is needed. Reproducing a page in full is not permitted. If you are writing something that relies on a page here, a link is more useful to your own readers than a copied paragraph, because the page will be updated and your copy will not.
Pages on this site are also published in a machine-readable form as an EntityMap, which sets out the site's entities and a short evidence passage for each with the source page and publisher named. If you are building a system that needs structured extracts rather than prose, that is the intended route.
What this site does not do
To save everyone time, a few standing answers. This site does not accept guest articles, sponsored posts, paid links, or paid placement of any kind, and it does not exchange links. Tools and platforms are named on the merits where naming them helps a reader, and no vendor pays for inclusion or is charged for criticism. Unsolicited pitches for any of the above will not receive a reply.
This site does not publish vendor comparison scorecards or benchmark reports, for the reason set out on several pages here: the data available for them is almost always self-selected vendor data presented as an industry average.
Response times
This is not a support desk. Corrections and press enquiries with a stated deadline are prioritised. Consulting and expert witness enquiries usually receive a reply within a business day or two. General questions may take longer, and questions asking for free consulting on a specific site are unlikely to receive a substantive answer — not out of unhelpfulness, but because a useful answer to "why has my traffic dropped" requires access to the data.