A significant proportion of your revenue is generated by customers who have used your internal engine. This is an important time when the user is looking and waiting for the site that responds to its request appropriately. The proper functioning of your internal engine is therefore essential to ensure. Assessing the overall performance of the internal search engine passes through the comparison of the performance of search visits and visits without research. The indicators used for this comparison are: -The share conversion -The share conversion of search visits -Visits Transformed passed through the engine / Visits transformed If the conversion rate of visits with research is lower than visits without research, it means that the internal engine is less efficient. New customers tend to use the engine to find their desired product. The internal engine must support the number of conversions of new customers. If the engine has a lower first order rate, it should improve the display of results by supplementing information that may convince new visitors. If products appear in greater numbers in the basket without looking transformed visits compared to those with research, this means that the internal engine fails to induce the purchase of those products. The study of the contents of the baskets used to identify products for which the engine is less likely to generate purchases and on which engine optimization should be performed. The number of page views before processing counts the number of pages it took to load before the transformation is completed. If this search indicates a number lower than the actual visits made without research, it means the search engine has direct access to the detailed content without going through intermediate pages navigation. Similarly, the average duration of visits that result in a transformation is an indicator to follow. The study of this indicator returns to read the average time between loading the homepage of the visited site and the conversion page as the page output. If the duration is shorter for search visits, it means that the engine has performed its role by displaying relevant results and allowing a quick purchase of the product.