32 common WordPress mistakes and how to avoid them

Managing multiple WordPress sites requires attention to detail to avoid performance, security, and usability issues. At Modular DS, we know that time is crucial for agencies and professionals. That is why we have compiled the most common mistakes and their solutions, grouped by area, to optimize your management.

Basic Management and Hosting

• Confusing WordPress.com with .org: The .com version is a closed service, while the .org version is self-hosted and gives you total control. Always use WordPress.org for professional sites.
• Choosing inadequate or overpriced hosting: Do not overpay for resources you do not use (like some GoDaddy plans). Look for a provider with an excellent price-quality ratio and optimized for WordPress (with good PHP support).
• Not keeping WordPress updated: Ignoring core, theme, and plugin updates creates vulnerabilities. With Modular DS, you can securely manage bulk updates.
• Not making backups: A backup saves you from any disaster. Use plugins like UpdraftPlus or, to save time across multiple sites, schedule bulk backups from a single dashboard with Modular DS.

Performance and Speed

• Not using a caching plugin: Speed is vital for SEO and user retention. Install tools like WP Fastest Cache (free) or WP Rocket (paid).
• Too many plugins: Every extra plugin slows down your site and opens security gaps. Keep only the strictly necessary ones.
• Unoptimized images: Heavy photos drag down loading times. Use modern formats (WebP) and compress your images with TinyPNG or ShortPixel.
• Not using a CDN: Networks like Cloudflare or Jetpack speed up loading times by delivering content from servers closer to your users.
• Ignoring the database: It accumulates junk over time (revisions, spam). Clean it periodically with WP-Optimize or WP-Sweep.
• Abusing visual builders: Some page builders add unnecessary code. Prioritize lightweight options like GenerateBlocks or the native editor (Gutenberg).
• Not measuring performance: If you do not measure, you cannot improve. Analyze your website with Google PageSpeed Insights or GTmetrix.

Security

• Using “admin” as a username: It is the first name hackers try. Create a unique user and delete the default one.
• Weak passwords: Use long alphanumeric combinations and rely on managers like LastPass.
• Not enabling two-factor authentication (2FA): Protect access by adding an extra layer with plugins like Two Factor Authentication.
• Allowing unlimited login attempts: Stop brute force attacks using the Limit Login Attempts plugin.
• Downloading resources from dubious sources: Avoid malware by downloading themes and plugins only from official repositories or trusted sites like ThemeForest.
• Missing SSL certificate: Having your website marked as “Not secure” drives clients away. Make sure you have HTTPS active (Let’s Encrypt is free).
• Poorly managed user roles: Do not give administrator permissions to everyone. Use specific roles (editor, author) with User Role Editor.
• Unprotected forms: They are a spam magnet. Protect them with Google reCAPTCHA or Antispam Bee.

SEO and Content

• Not installing an SEO plugin: It is essential for capturing organic traffic. Configure Yoast SEO or Rank Math.
• Ugly permalinks: Default URLs do not help with ranking. Change them in Settings > Permalinks and choose “Post name”.
• Leaving sample content: Google can index demonstration posts (“Hello world”). Delete them right after installation.
• Forgotten audits: Outdated content hurts your authority. Review it quarterly with tools like SEOPress.
• Stealing images from Google: Avoid lawsuits by using free image banks (Unsplash, Pexels) or premium ones (Freepik, Envato).

Design and Usability

• Neglecting mobile navigation: More than half of web traffic is mobile. Use responsive themes (like Astra) and check real-world usability on phones using plugins like WP Mobile Menu.
• Forgetting the favicon: That small icon in the browser tab gives your brand identity. Upload it from Appearance > Customize.
• Generic 404 pages: Do not frustrate users who land on a broken link. Create a useful 404 error page with a search bar and links, and use the Redirection plugin.