The main purpose of this bachelor's thesis was to implement the results of A/B testing in the frontend of an online shopping website. The e-commerce website is based on the Magento 2 platform and mainly focuses on furniture and home accessories.

At the beginning of the research process, the best User Interface practices and examples were analyzed to make reasonable conclusions about testing results of the website. The testing data was taken from the third-party company's research of different parts of the online shop. During the development process, practical results of testing have been implemented in the frontend part of the project. The User Interface element was created and functionality was added.

As a result of the thesis, a new popup element on the product page was implemented based on the Magento platform. The analysis of two different cases in the A/B test shows that the case with popup element leads to a greater site conversion than other variants without it. In the future, more tests will be conducted on the website to improve the user journey, also the functionality of the online shop will be improved.