Need help cleaning, updating, and enriching a contact list

I have a spreadsheet with business/contact information that needs to be cleaned, updated, and completed. Some records may have missing details such as company website, contact name, job title, email, phone number, LinkedIn profile, company location, or source link. I need someone who can review the sheet carefully, research the missing information online, verify the details, remove duplicates, and organize everything properly in Google Sheets. The work is simple but requires accuracy and attention to detail. I don’t want guessed information, so if something cannot be verified, it should be marked clearly instead of adding incorrect data. Tasks may include: Review the existing contact list Find missing company/contact details online Verify websites, emails, phone numbers, and LinkedIn profiles where available Remove duplicate or incorrect records Clean and format the spreadsheet Add source links for verified information Keep the data organized and easy to read Flag any incomplete or unclear records The ideal freelancer should be comfortable with: Google Sheets or Excel Web research Contact research Data cleaning Data verification Lead/contact list organization Attention to detail If the first batch is completed accurately, there may be more ongoing work.