What is a URL Slug?
A URL slug is the human-readable part of a URL that identifies a specific page. It comes after the domain name and any folder structure.
For the URL https://thecaseconverter.in/url-slug-best-practices/, the slug is url-slug-best-practices.
Why URL Slugs Matter for SEO
URL slugs directly affect:
- Click-through rate — descriptive URLs are clicked more often in search results
- Keyword relevance — search engines read URLs as ranking signals
- Link equity — clean URLs are more likely to be shared and linked to
- User experience — readable URLs build trust
Best Practices
1. Use hyphens, not underscores
- ✓
what-is-title-case - ✗
what_is_title_case
Google treats hyphens as word separators. Underscores create compound words — Google reads title_case as one word, not two.
2. Keep slugs short
- ✓
url-slug-seo(3 words) - ✗
best-url-slug-practices-for-seo-2025-complete-guide(9+ words)
Aim for 3–5 words. Include the primary keyword.
3. Use lowercase only
- ✓
url-slug-guide - ✗
URL-Slug-Guide
URLs are case-sensitive on most servers. Mixing cases creates duplicate content issues.
4. Include your target keyword
- ✓
snake-case-converter(for a page about snake_case conversion) - ✗
tool-page-7
The keyword in the URL is a moderate ranking factor.
5. Avoid stop words when possible
- ✓
remove-duplicate-lines - ✓
word-counter-tool - ✗
how-to-remove-the-duplicate-lines-from-your-text
Short, direct slugs perform better and look cleaner in search results.
6. Avoid dates in slugs
- ✓
url-slug-best-practices - ✗
url-slug-best-practices-2025
Date-stamped URLs become stale and require redirects when content is updated.
7. Never change a slug that has backlinks
Changing a URL that already has inbound links destroys that link equity unless you set up a 301 redirect. If you must change a URL, always redirect the old URL to the new one.
URL Structure Checklist
- All lowercase: ✓
- Words separated by hyphens: ✓
- Contains target keyword: ✓
- 3–5 words long: ✓
- No special characters: ✓
- No stop words (unless necessary): ✓
- No date stamp: ✓
- No dynamic parameters in the slug: ✓