Scenarios are great

We use [DemandTools] to match contacts from external lists to our current database
and organization in Salesforce. It helps highlight existing contacts or
acknowledging ones that need to be created and managed differently. it
is helpful in that regard. I think other departments use it differently
for deduping records, creating leads, other means, etc. but I use it
mostly for matching external lists from spreadsheets sent from other
departments looking to have reports made and then using those reports to
send major email communications to. It is pretty easy to use,
especially once you load in scenarios that you can reference later. It helps manage
data, that's probably it's greatest business solution being offered.