The Campaigns list allows you to collect a curated list of contacts and companies in one place, great for creating groups of contacts, such as for call lists. Sales campaigns also help you keep track of the number of activities, appointments, opportunities and orders created for the companies inside the campaign.
Campaigns and segments are similar. Segments include a list of companies and contacts that are dynamically updated based on whether the company and contact meets the segment filters at that time.
Campaigns retain the same companies and contacts until you remove them.
Also see the article on Creating a Sales Campaign.
To customize your Campaigns list, you can:
Once you have customized a list, you can save that view to return to it easily later.