New feature: "Display Trends and Analytics summary" (in all reports)

The goal is to propose a new view into for existing reports in Piwik, mining the underlying data in relevant ways to give the user a summary of what has changed in the data, what is working out well, and what is getting better.

Content of the new report

The new UI would display a few new reports to give insights about what is worth keeping on an eye on:

Best new [Websites] in the selected period
Best new [Websites] in last 3 periods
- NB: new website are websites that have traffic in the period and was not used in the previous 3 periods before this one
Fastest growing [websites] contributing to overall traffic
- NB: these are the websites that are not new, but are now contributing more than before, and have significant % visits
- NB: The % treshold could maybe be modified with a simple controller -- and recorded/restored

Notes

Table display: Each table for these reports would display between 0 and 6 rows by default,
- the view would be filtered to only show the statistically significant changes that are worth looking into
- Later in V2, allow user to modify the % threshold used to define "significant" changes. Record as setting and restore.
Metric used: The algorithm would be based on Visits metric by default for most reports. For the tables in the "Goals" report, the algorithm would use the number of conversions as metric.
when there is no visit to compare against (new website), be clever and select the most oldest data available and show trends on what's there only (or show a message "No trends yet" or similar when not enough data).
the new Analytics view would be available on most reports in Piwik: Keywords, Websites, Page URLs, Page Titles, Browsers, Countries, etc. displays when a new icon is clicked. Icon would be a light bulb for example "Trends" below all reports [[Image(http://www.iconfinder.com/icondetails/25348/22/)]]
- or displayed by default in some reports, for example on the right space currently empty in most report, next to the: Keywords report, Websites, Campaigns, Page titles, etc.
There would be a metric selector at the bottom of these reports, to choose the metric (Visits VS Conversions VS Ecommerce Orders VS Revenue etc.)
The Trends reports could also be added to PDF/HTML reports
For tables with subtables, eg. Custom Variables, Campaigns/Keywords, we could look at all subtables as well, to hilight the significant increases or new values (based on number of visits)
intelligent alerts, split in tasks types: Feeling imaginative? Read the keywords. Feeling like seeing Happy Summary? Feeling worried? Critical summary highlighting bad points / big changes.

Feedback Please answer these questions:

When you use Piwik, what are the regular things you are looking for?
- List the reports or mental checks you do
- Can these be automated in Piwik somehow?

matomo-org / matomo

New feature: "Display Trends and Analytics summary" (in all reports) #3032