diff --git a/scripts/certbot_renewal_report/README.md b/scripts/certbot_renewal_report/README.md
--- a/scripts/certbot_renewal_report/README.md
+++ b/scripts/certbot_renewal_report/README.md
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+# Certbot Renewal Report Script
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+This script is a `post-deploy` hook for [`certbot`](https://certbot.eff.org/).
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+It's fired when certbot successfully acquires or renews a certificate and will push metrics into [InfluxDB](github.com/influxdata/influxdb) indicating which domains were renewed.
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+This can then be used to develop alerting and give an early alert if a certificate has not been renewed within a desirable time-range
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+Setup is simple, ensure that you've got the dependencies
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+ apt-get install python3-requests
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+Drop a copy of the script into `/etc/letsencrypt/renewal-hooks/deploy`
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+ chmod +x /etc/letsencrypt/renewal-hooks/deploy/certbot_renewal_report.py
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+And move onto configuring
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+There are a number of variables that need setting. The easiest way to do so is to edit the top of the script
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+ # Measurement name to use in InfluxDB
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+ measurement = os.getenv("MEASUREMENT", "certbot_renewal")
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+ host = os.getenv("HOSTNAME", os.uname()[1])
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+ influx_url = os.getenv("INFLUXDB_URL", "http://127.0.0.1:8086")
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+ # Token, empty or username:password
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+ influx_token = os.getenv("INFLUXDB_TOKEN", "")
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+ # Major version of InfluxDB in use
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+ influx_ver = os.getenv("INFLUXDB_USER", "2") # or 1 for 1.x
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+ # Database/bucket name
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+ influx_bucket = os.getenv("INFLUXDB_BUCKET", "telegraf")
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+Alternatively, you can ensure these values are exported into the environment that certbot is running in.
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+- `host`: hostname of the system running the script
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+- `domain`: domain cert was acquired for (or `all` for the global stat)
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+- `renewed_count`: how many certificates were renewed for this series?
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+### Line Protocol Example
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+certbot_renewal,domain=all,host=optimus renewed_count=2 1656169934438253518
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+certbot_renewal,domain=foo.example.com,host=optimus renewed_count=1 1656169934438253518
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+certbot_renewal,domain=bar.example.xyz,host=optimus renewed_count=1 1656169934438253518
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+Copyright (c) 2022 [Ben Tasker](https://www.bentasker.co.uk/)
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+Released under [GNU GPL V3](https://www.gnu.org/licenses/gpl-3.0.txt)