Many Piwik users log every day, every week, or have some kind of "routine". But many Piwik users also login at random intervals, depending on many factors.

It would be nice to reduce the user frustration and highlight clearly all the things that have changed and are significant, since the last time they logged in.

The widget could say for example:

What's changed since Jan 23rd (last login)?

Increases:
 * New significant search keywords: $K1 (1304 new visits), $K2 (23 new visits), $K3 (11 new visits)
 * New significant website referers: ....
 * New pages with significant traffic: $BLOG_POST1 (155 views), ...

Decreases:
 * Some pages lost significant traffic: $P1 (55 visits, -555%), $P2 ....
 * Some keywords used to be strong but have sharply decreased: $K1 (4 visits, -800%)
 * Ecommerce sales sharply decreased for these products: $P1 (11 sales down from 155: -93%), ....

• This would basically show the best movers&shakers: automatic translation update #57 for important selected reports such as Referers, Actions.
  • The widget would maybe have 3 tables to change the period the stats are generated for and let user choose the best range: Insights based on: daily data, weekly data, monthly data
• The insights period would be automatically selected based on the last login date (if user last logged in 8 days ago, show weekly insights for example as he is more interested in the bigger picture) VS a user who last connected yesterday.

As a first step of this ticket, we could store the last user login datetime.

This would make user experience more enjoyable as it would reduce time spent looking for insights.