On-site retargeting refers to the strategic use of personalized messaging and targeted offers on a website to re-engage and convert visitors who have previously shown interest but did not complete a desired action. This technique utilizes data tracking and analysis to deliver relevant and timely content to visitors, increasing the chances of conversion and customer retention. By tailoring the on-site experience to each individual, on-site retargeting aims to create a more personalized and effective interaction between a brand and its potential customers.