
3 answers
In the top right corner next to your name there should be a blue drop down box...
From there select Data.com and it will take you to the Data.com SFDC interface.
Start browsing and searching contacts and when you find one that you want to add, there should be a box that says Add to Salesforce...
Pretty simple to use. Let me know if you have any questions! If this answered your question please mark my answer as the best answer!! Thanks!