In tackling the task of converting 100,000 addresses into latitude and longitude coordinates, my proficiency in Excel ensures both efficiency and accuracy. Leveraging advanced Excel functions like VLOOKUP, CONCATENATE, and IFERROR, I'll streamline the process of geocoding each address. My approach involves employing Excel add-ins such as Power Query to fetch data from online geocoding services like Google Maps or Bing Maps, ensuring precise coordinates for each record. I'll meticulously clean and format the address data to eliminate inconsistencies, maximizing geocoding accuracy. Additionally, I'll implement error handling techniques to address any discrepancies encountered during the process.