On my personal social media account, advertisements that target me are usually popular clothing websites, or restaurants. These ads are effective when they are not overbearing or constantly popping up on my social media. Another way they might be effective is when they show up after I had searched something similar before. It seems like typically things I will search on my phone or computer, show up on my social media because they are obviously an interest of mine. Companies can track if these ads are effective or not by charting which ads get more likes than others, and to track if the link to their ad is clicked on their targeted audience.