if i have multiple sources for a linkedin URL and i want to enrich the person, what's the best practice of cleanly doing it? I always build a formula that asks which of my columns has content and then

Your formula approach is actually the standard best practice. Use formulas that trigger enrichment only when conditions are met - this gives you clean control over which URL source to prioritize. [documentation For people enrichment, you need the profile URL as a "corner piece" - the essential identifier before enriching. [clay.com Your conditional formula ensures you're using the best available URL source, which is more reliable than letting the enrichment randomly pick from multiple columns. This approach maximizes accuracy since results are always better when you have a clean, prioritized URL input. [clay.com