Designing Privacy-Compliant Data Collection and Behavioral Analytics for My Morse Code Website Using Piwik PRO

I run a Morse Code translator and learning website that allows visitors to convert text into Morse code, decode Morse messages, listen to Morse audio playback, use interactive practice tools, and access educational content. As the website grows, I want to better understand how users interact with the platform so I can improve the learning experience, identify usability issues, and prioritize future development. I am currently evaluating Piwik PRO as a privacy-focused analytics solution, but I am facing several challenges in determining the most effective and compliant way to collect meaningful behavioral data from a highly interactive application rather than a traditional content website.

One of the biggest challenges is deciding what user interactions should be tracked and how those interactions should be structured within Piwik PRO. Unlike a standard website where page views and form submissions provide most of the useful information, my Morse Code platform generates a large number of micro-interactions. Users type text into the translator, generate Morse output, play Morse audio, copy results, switch between encoding and decoding modes, and use learning tools repeatedly during a single session. I am unsure whether each of these actions should be tracked as individual events or whether they should be aggregated into higher-level behavioral metrics to avoid creating excessive data volume and overly complex reports.

Another concern involves privacy and data minimization. Because users often enter custom text into the Morse Code translator, I want to be extremely careful about ensuring that no potentially sensitive user content is collected unintentionally. My goal is to measure how the translator is being used without storing the actual text users enter into the tool. I would appreciate guidance on best practices for tracking engagement with interactive applications while minimizing data collection and ensuring compliance with privacy regulations. Specifically, I am interested in understanding how others configure event tracking to capture meaningful usage patterns without collecting user-generated content.

I am also exploring visitor segmentation and user journey analysis. Ideally, I would like to distinguish between users who primarily use the translator, users who focus on educational content, and users who engage heavily with practice tools and Morse audio features. However, because many visitors do not create accounts or identify themselves, I am uncertain how effective anonymous visitor segmentation can be over longer periods. I would like to understand what types of segmentation strategies are commonly used within Piwik PRO for websites that rely heavily on anonymous interactions and educational engagement rather than traditional conversions or purchases.

Another technical challenge relates to performance and implementation. The Morse Code translator operates in real time using JavaScript, and maintaining a fast, responsive experience is a top priority. I am concerned that implementing extensive event tracking could introduce unnecessary overhead, increase network requests, or negatively affect Core Web Vitals, especially on mobile devices. I would appreciate recommendations on efficient event collection strategies, batching approaches, consent-aware implementations, and techniques for ensuring analytics remain lightweight while still providing actionable insights.

Finally, I would greatly appreciate advice from the Piwik PRO community regarding the overall analytics architecture for a privacy-focused educational web application like mine. For a Morse Code website with real-time interactions, anonymous users, educational content, and multiple engagement paths, what would be the recommended approach to event design, visitor segmentation, consent management, and reporting? My goal is to collect useful behavioral insights that help improve the platform while maintaining strong privacy protections and avoiding unnecessary collection of user data. Sorry for long post!

Welcome to the community! Your website sounds like a fun project. I will do my best to answer as many of your questions as I can :smiley:

  • What to track?
    It’s really up to you. What is nice about Piwik PRO design is that it doesn’t track much automatically, so it’s easy to protect sensitive data recorded in events
    Beware though: downloads (names of files) and outlinks (links leading outside of the website) are tracked automatically by default. Can be disabled. Same goes for scrolls, but there is no risk of those carrying sensitive data. Also in some cases, searches can be automatically detected, or confused with anything that uses “s”, “query” “q” and few other url query params.
    But other than that, it’s up to you what to track.
    For this, your best friend is event type called Custom Event which you can track with one of the default templates in the Tag Manager.
    From my experience, it’s most important to figure out the right grouping of the interactions which translates to how you structure your events, top down: Custom Event Category, Custom Event Action, Custom Event Name. There is no fixed scenario for using those since with current Piwik PRO reporting you can structure them in any way, but category->action->name is the one you find in the default report.
    On top of that, you may want to do some numerical stats with those since each Custom Event can also carry a floating point (0.001) value that later can be used for min/max/sum/median/average calculatuions in report - so for example you could track “how many chars of a message was someone translating/playing”.

    So again, its up to you to figure out what is it that you want to track. It’s best to figure that out by considering what you really want to report on, what is crucial from what you want to see. It’s mostly important from subscription limit point of view - you don’t want to use it up it too quickly.

    I usually proceed by mapping out app modules/features as Custom Event Category, then specific buttons/controls as Custom Event Actions (e.g. some checkbox, some dropdown, some button), and then any specific stuff (e.g. option chosen in dropdown, checked/unchecked state of the checkbox)

    Custom Event Category and Action are mandatory for event to be recorded, Name and numerical Value are optional.

  • Data Privacy
    You explicitly configure what is put in events, so it’s just important to consider all the things you do. You would have to pick a value from a message field or something like that for it to be tracked - simply don’t do that :smiley: instead work with “message field focused/unfocused”, you can track length of messages (unless you consider that also sensitive).

    As far as I know, Piwik PRO heatmaps also don’t track anything sensitive since they are just tracking what elements are clicked, they are not pulling visualisations of live sites nor the content input.

  • Data Minimization
    Each event is sent as another request, but even with very dense tracking I haven’t ever experienced performance issues. You can sent enable caching events to send them in intervals: setDispatchInterval

  • Segmentation and analysis
    Well that could be a whole separate post really to discuss those. How you will be able to segment depends on the events you track - obviously :smiley: but here it is important to get to know a little bit more about data model in Piwik PRO Analytics - it slices both events and sessions at once, and there is no “user” context". So later what you see will also depend on what you’ve put into report definition.

    Get yourself familiar with idea of Goal Conversions in Piwik - you can have custom logic on the app end to trigger those, and those are best for segmenting “various groups of users that did something specific” because of “Goals in session” building block available in Custom Reports.

I hope you will find my thoughts useful :slight_smile: