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Google’s COVID-19 Community Mobility Reports show how visits and length of stay in various place categories have changed compared to a baseline period before the pandemic.
The reports, which are published on an ongoing basis, illustrate movement trends over time with respect to geography (including country, state and county) over a six-week period, with the most recent data representing approximately 2-3 days ago (the amount of time it takes to produce the reports).
Mobility changes over time for California. The graph appears on Google News’ coronavirus portal; the data is sourced from Google’s COVID-19 Community Mobility Reports.
Place categories. Community Mobility Reports present trends in the following place categories:
Retail & recreation. Grocery & pharmacy. Parks (refers to official national parks, not the general outdoors found in rural areas). Transit stations. Workplaces. Residential.
The categories bundle together destinations with similar characteristics for the purpose of social distancing guidance. For example, grocery and pharmacy are grouped together because they tend to be essential trips.
Each category may contain many types of places and Google publishes trends for the above categories because they are useful for social distancing efforts and access to essential services.
What the baseline refers to. The baseline refers to the median day-value between January 3 and February 6, 2020. Essentially, it represents a “normal” value for that particular day of the week. Therefore, the baseline is actually seven distinct values (one for each day of the week).
The baseline days never change and also do
Read more here: http://feeds.searchengineland.com/~r/searchengineland/~3/kmhCnY-OnEM/google-mobility-reports-covid-see-how-visits-to-retail-grocery-workplaces-trending-by-area-339922