Answers · As of 6 October 2026
Answers to questions business owners ask
Each page answers one question in two sentences, then shows the figures behind it, each with its source.
AI search
- Can ChatGPT read my website?Yes, if your website allows requests from OpenAI. Two crawlers, two purposes, and figures on how often ChatGPT mentions company websites.
- What is llms.txt, and does my website need it?llms.txt is a table of contents for AI programs. What measurements show about its spread, retrieval and impact.
- Does robots.txt keep AI crawlers off my website?robots.txt is an instruction, not a technical block. What Google and Anthropic say about this and what a measurement of 592 websites shows.
- Does AI search bring visitors to my website?AI summaries cost clicks, but visitors from AI services are worth more. The numbers from Pew, Semrush and Ahrefs.
Email delivery
- Why do my emails end up in spam?Most of the time, there is no proof that the email comes from your domain. What Gmail and Outlook require and what complete records deliver.
- What is DMARC, and do I need it?DMARC is a DNS record that tells recipients how to check emails from your domain. Who needs it, and how many domains do not have it.
- Does my newsletter need one-click unsubscribe?Gmail and Yahoo require one-click unsubscribe for marketing and newsletters. Who this applies to and which deadline Yahoo names.
Accessibility
- How much contrast does text on a website need?At least 4.5:1 for normal text, 3:1 for large text and interactive elements. Insufficient contrast is the most common error on homepages.
- Which barriers are most common on websites?95.9% of homepages have machine-detectable errors, on average 56.1 per page. The most common is insufficient contrast.
New customer acquisition
- What reply rate is realistic for B2B cold outreach?On average 3.43%, under 1% on a strict count, 5 to 18% with a concrete trigger. The benchmark figures and what distinguishes them.
- Is it worth following up on an unanswered email?Yes: a single follow-up email increases the number of replies by 65.8%. Even so, almost half of salespeople never follow up.
- LinkedIn request: with or without a note?Without a note, requests are accepted slightly more often, but with a note replies are significantly more frequent: 8.2% versus 5.3%. The figures come from over 15 million contacts.