I was looking for a better way to research potential publishing partners when I noticed that traditional backlink metrics did not always explain which websites were referenced by AI assistants. For our next marketing campaign, I wanted to identify external sources that were relevant to our niche and potentially useful for increasing brand visibility. RankSpot's https://www.rankspot.ai/most-cited-sources caught my attention because it provides a directory of domains cited in tracked AI answers. I spent time reviewing how the index organizes websites and presents their citation frequency. One detail I appreciated was the ability to distinguish between how often a source appears in answers and how many individual links it receives. Those numbers describe different things, so having both helps avoid misleading conclusions. I also found it useful that citation data is broken down by AI engine, allowing me to see whether a domain is referenced more often by one service than another. I used this information as a research starting point rather than treating the ranking as an automatic list of outreach targets. Some websites might be popular sources but still have little relevance to a particular business, so I would examine their content and audience before making decisions. The directory helped me identify domains worth investigating and gave me a more informed approach to planning content partnerships. It also reminded me that AI visibility depends partly on the wider information environment around a brand, not only on the pages published on its own website.