This document describes various growth hacks used by different companies. Hotmail added a footer to every email encouraging recipients to get a free email account. Facebook found tagging friends in photos led to increased engagement. Twitter simplified their landing page over time, reducing options to just sign in and sign up. LinkedIn focused on making engaged users more engaged rather than inactive users. Path based friend suggestions on mutual friends and direct suggestions, and allowed inviting friends from Facebook and contacts.

1. Case Studies of
Awesome Growth Hacks
Brought to you by GrowthHacker.jp
Supported by AppSocially

2. "P.S. I love you. Get a free email account." on Hotmail
Hotmail
AcquisitionTag:
* Hotmail added a footer on every single email sent via Hotmail.
Brought to you by

3. "Tagging friends on photos" on Facebook
Facebook, Inc.
EngagementTag:
Facebook's growth team figured out
"tagging friends on photos" works most for
engagement (and even resurrection).
Brought to you by

4. "Twitter's landing page optimization" on Twitter.com
Twitter, Inc.
ActivationTag:
* 15% conversion rate 3 years ago
* 10%+ 1.5 years ago
* 6%+ now; "Less is more." There are only "sign in" and "sign up".
3 years ago
1.5 years ago
now
Brought to you by

5. "Congratulations! You are top 5%!" on LinkedIn
LinkedIn
RetentionTag:
* Translate the number of users to "attractive" number for engaged users. LinkedIn's
focuses on making engaged users more engaged, not making in-active users understand
its value.
Brought to you by

6. "Find Friends" on Path - (iOS)
Path, Inc.
ViralityTag:
* "Suggestions" are selected based
on direct suggestion by friends and #
of mutual friends.
If the invitee is
unknown,
Add message
with voice; text
App invitation
Message
* Friends on Facebook and
AddressBook are categorized into
"Friends/Content on Path" and
"All (other) Friends."
Brought to you by

7. "Invite a Friend" on Path - (iOS)
Path, Inc.
ViralityTag:
* "Top Friends" are selected based
on same "Family Names" and
interaction on Facebook.
* "All Friends" are all of your friends
on both Facebook and
AddressBook.
If the
invitee is
unknown,
Add message
with voice; text
App invitation
Message
Brought to you by

8. "Promote" on Path - (iOS)
Path, Inc.
ViralityTag: Brought to you by

9. "Send link to your mobile device" on Path - (iOS)
Path, Inc.
AcquisitionTag:
Desktop Mobile
Path User Potential Path User
* Track activation by specifying why new
user started using Path.
Download
* Input your mobile phone number
into your "Setting"
New Path User
Existing
Path User
* Phone # input on
Inviter's landing page.
* Phone # of
new user.
* Track acquision.
Brought to you by

10. "Sign up form added on landing page (though it's mobile-fisrt app" on Path - (iOS)
Path, Inc.
ActivationTag:
Previously
Now
Dave Morrin's Answer on Quora:
Brought to you by

11. "Import your AddressBooks" after being connected with someone - (Web)
LinkedIn
ViralityTag:
When successfully connected with
someone, LinkedIn asks you to import
AddressBooks from many social
(emailing products).
Brought to you by

12. Engage to take action by "social-actioned" message - (Email)
LinkedIn
RetentionTag:
Send message when your connection have event to engage and
make the user take action for this social-actioned event.
Brought to you by

13. Start tracking before signing-up - (Landing Page)
Intercom
ActivationTag:
Make installation easy and start tracking before signing-up. This helps
activation rates much bigger.
Brought to you by

14. Make sharing quote easy- (Web)
Quora
ReferralTag:
Make sharing to social media easy to make more
traction.
Brought to you by

15. "#CrowdFundCanada" by Everlane - (Web)
Everlane
ViralityTag:
Before launching Everlane in Canada, it launched "kickstarter'-like crowd
funding campaign on its own site and measured if it's needed with actual
local customers.
Monetization Brought to you by