Multivariate Testing Service (M/V Testing)- “It’s all about an accurate measurement”

With the advancement of web services, you are free to test your multifarious ideas by having the deeper analysis of the fact, what worked perfectly well with the visitors, and what sort of technique brought up the visitors to their targeted area, as well as what actually put them off to take the action.

After these analyses, making changes to single element can drastically increase or decrease the conversion rate of any certain page or its performance. But, now the question is, how would you measure the impact of the changes you made to the pages, especially the fully precise data?