1-2 of about 2 matches for site:www.websiteoptimization.com over-optimization
https://www.websiteoptimization.com/speed/tweak/author/andy/
Statistics , Website optimization PPC Optimization: Avoid Over Optimization There is such a thing as over optimization in PPC
https://www.websiteoptimization.com/page/2/
October 1, 2018 PPC Optimization: Avoid Over Optimization There is such a thing as over optimization in PPC