The "contains" and "does not contain" filter operators should not be used
Impact area
Performance
Severity
Medium
Affected element
Report
Rule ID
SF-0136
Impact
Selective filters generally work faster than more general ones, all else being equal. Try to make your filters as selective as you can.
Remediation
Use the equals or not equal to operators instead of contains or does not contain.
Time to fix
30 min
References
See the Salesforce documentation resource: Improve Report Performance > Best Practices