Clearing cookies breaks long‑term tracking and helps prevent advertisers (or malicious actors) from following your online behavior.
Research repeatedly shows that deleting cookies reduces cross‑site profiling and limits exposure of personal data. 

2. Stop Session Hijacking Risks

If a cookie isn’t there, it can’t be stolen. Regular deletion ensures any active session tokens cannot be reused by attackers.
Security professionals emphasize this as a fundamental preventive measure. 

3. Fix Website Errors or Login Issues

Corrupted cookies often cause:

• login loops
• broken website functions
• loading issues 

4. Remove Sensitive Data Stored in Cookies

Some websites store personal details or preferences in cookies. Clearing them prevents unauthorized access if someone else uses your device or if malware gains access.

🧭 Best Practices for Cookie Safety

✔ Accept only necessary cookies

Your internal cybersecurity email already recommends selecting “essential only” options in cookie consent banners.

✔ Block third‑party cookies

This reduces tracking and mitigates cross‑site profiling.
Supported by multiple cybersecurity advisories.

✔ Clear cookies regularly

Especially after logging into sensitive accounts or using shared/public devices.
This helps eliminate session tokens and tracking identifiers.

✔ Use Incognito/Private Mode When Necessary

Private browsing avoids storing cookies and is helpful for quick, secure sessions.

✔ Keep your browser updated

Modern browsers include enhanced protections against cookie theft.
However, attackers continually adapt—so updates are essential. 

✔ Enable Multi‑Factor Authentication (MFA)

Even with stolen cookies, MFA adds an extra barrier.
Security experts universally recommend MFA for all critical accounts.