The Sources page shows every place new companies come from and which list or campaign each one fills.
Search
Describe who you want in plain words, like "dental clinics in Ohio with 5 or more locations". Search returns companies with their Fit and the reason they match. Use Narrow these to filter by country or size, then save them to a list or start a campaign.
Daily searches
Keep a search running and it adds new matches every morning to a list, and to a campaign if you choose. Find them all on the Daily searches page and in the Search history rail. Edit changes the size, country, words to include or leave out, and the daily limit. Tune in Search shows what it would find tomorrow before you save.
Daily feeds
Daily feeds (under Signals) bring in companies the week something new happens: product launches, new startups, funding news, new online stores and websites, new investment firms, and new government contractors. Feeds that suit your business are recommended. Each one files companies on a list and can add the best fits to a campaign every day, with filters for keywords, minimum fit, country, and businesses that sell to businesses.
More sources
Your customers and lookalikes of them, your LinkedIn connections, people engaging on LinkedIn, companies on your website, new signups, businesses in an area, and lists you upload. See Campaigns for starting a campaign from any of them.