UTM link builder
Tag the links of your newsletter, ads and posts so your analytics shows which campaign each visit came from.
A naming scheme that stays tidy
Write tags in lower case and with hyphens instead of spaces, and reuse the same few mediums: email, cpc, social, referral. The source names the place, the campaign names what you are promoting.
Statsdot reads all five tags, groups visits into channels from the medium, and shows revenue per campaign when purchases are sent with their amount. Read the UTM tags guide
Free, no account needed. Nothing you type is stored.