SPF, DKIM and DMARC: Email Security for Your Domain
How SPF, DKIM and DMARC stop forged senders, what the DNS records look like and how to roll out DMARC in stages. With the Gmail rules since 2024.
Blog
This is where you will find in-depth articles on the eleven topics covered by this site. Each one opens with a short summary, so you can tell quickly whether it answers your question. At the end you will find frequently asked questions and the sources the article relies, such as Google, MDN Web Docs, OWASP or Germany's Federal Office for Information Security (BSI).
Some articles are hands-on guides. They show you how to keep your Google Business Profile in good shape, speed up your website or put together a social media content calendar.
Others help with decisions: What does an SEO agency actually do? When is a Google Ads agency worth it? Should your website be built by a agency, a freelancer or with a website builder?
Further articles cover security and the law. They explain security headers, how to set up SPF, DKIM and DMARC, how to check your own website and what Germany's Accessibility Strengthening Act requires. Two more look at AI answers: what is actually proven about generative engine optimization, and whether SEO is still worth the effort. Read them in any order you like. If the subject is new to you, SEO for beginners is a good place to start.
Generative Engine Optimization (GEO): What Is Proven
What GEO, AEO and LLMO mean, what Google officially says about AI search, what llms.txt is and how to check your visibility in AI answers.
Google Ads Cost: Cost per Click and Budget Explained
How much does Google Ads cost? How cost per click, Quality Score and daily budget work together, and how to work out a sensible budget.
Social Media Content Calendar: How to Create One
Create a social media content calendar: which columns, topics and posting frequency fit, and how to measure results. Get started in one hour.
Improve Website Speed: A Step-by-Step Guide
How to improve your website's loading speed: measure Core Web Vitals, optimise images and scripts, use caching. With a clear order of steps.
Optimise Your Google Business Profile: A Guide
How to optimise your Google Business Profile with the right category, details, photos and reviews, plus a checklist for better local visibility.
Content Marketing Strategy: Build One in 6 Steps
Content marketing strategy step by step: goal, audience, topics, formats, channels and measuring success. With a one-page template.
SEO for Beginners: How to Get Started the Right Way
SEO for beginners, explained simply: how Google finds pages, which keywords matter and which five steps you can take today.
Security Headers: HSTS, CSP and More Explained
What HTTP security headers like HSTS, Content-Security-Policy and X-Frame-Options do, and how to roll them out and test them safely.
Check Website Security: What a Scan Shows and What to Test
How to check your website's security: HTTPS, headers, exposed files, updates and email. With the OWASP Top 10, scan limits and an order for fixes.
What Does an SEO Agency Do? Tasks, Costs and Choice
What an SEO agency actually does, what SEO costs per hour and per month, and how to spot a reputable agency. With questions for the first meeting.
Link Building: Earn Backlinks Safely and Spot the Risks
What backlinks are, what Google treats as link spam and how to earn quality links the clean way. With notes on choosing a link building agency.
Is SEO Still Worth It? SEO in the Age of AI Answers
AI Overviews and AI chat assistants are changing search. Is SEO still worth it in 2026? What Google itself says and what you should do now.
Accessible Website: BFSG, WCAG and a Practical Checklist
What makes a website accessible, who Germany's BFSG has covered since June 2025, and how to test your site by keyboard, screen reader and checklist.
Local SEO Agency or DIY? A Guide for Local Businesses
What a local SEO agency handles, what you can do yourself and which Google guidelines you should know. With steps and questions for choosing.
Google Ads Agency: Services, Costs and How to Choose
What a Google Ads agency does, how it charges, what the Partner badge means and when you can run Google Ads yourself.
WordPress Agency, Freelancer, Site Builder or DIY?
What a WordPress agency does, when a site builder is enough and what to watch for with costs, maintenance and the handover of your website.