You can hide a company, if you don't want to see a certain visitor to your website.
Here's what to do:
STEP 1: Click on a company in your lead feed.
STEP 2: Click on Hide and select the checkbox for Hide the lead for your website. Choose to either hide all the leads of the same company or only this lead. Select then Hide.
NOTE: Hiding a company will delete all earlier visit details and historical data regarding that company. Keep this in mind before hiding your leads. Please, also notice that hiding a lead from your feed hides the lead from all of your company's Leadfeeder users.