Performance testing checks if a system performs according to requirements under stress loads. Load testing verifies effectiveness with large volumes. Volume testing processes huge amounts of data. Most advertising on blacklisted websites did not stop, so the unit shared information with online ad companies and networks to reduce revenue. So far, 40 websites have been shut down without legal process. Authorities must obtain court orders before closing websites. Integration testing evaluates modules together, while process testing evaluates functionality and performance at different loads. Leader testing is the first acceptance testing phase. Testing helps eliminate defects from software before launch.