Analyze internal search engine requests

We need to know more about what people expect from Tails, for example to improve newcomers documentations.
Analyzing internal search engine requests could provide some indications

Now that we have a Google account and our website authenticated. We can also study the search analytics from Google.

Parent Task: #11648

Related issues

• Related to #11650
• Related to #9900
• Blocked by #12562 (closed)

Original created by @elouann on 11649 (Redmine)