Add to documentation "Search filter"

[ChristineWuerth]

No description provided.

[ChristineWuerth]

• Check if all of this information gathered in initial draft documentation has been included: https://docs.google.com/document/d/1Fb6Vv-QS5tuYqhCYBcpGIaTNt4zDBeBMznz-7Nch-lE/edit?usp=sharing

[ChristineWuerth]

We have some leads for existing insights to dig out for the history and insights section:

• Ask a relevant PA / PA community about the following: Analytics into filters use show 1000's every week open filters but rarely use them (might indicate filters are confusing / not meeting needs vs not actually a useful way to narrow down)
• Ask Site search team about more on the following: analytics show pre-selected filters are confusing
• Ask Tara Stockford