Webhooks Going Further
Once you have a server that can accept data from Visitd, you can do all sorts of things with it. For example, you could:
Send an email each time you arrive at a customer site.
If you know the latitude and longitude of the customer site, you can compare that to the latitude and longitude and horizontal accuracy from Visitd to detect a visit to a client. Then you can use a service like Mailgun (opens in a new tab) to send an email to keep a record of the visit.
Add a line to a Google spreadsheet
You could use Google's API to add an entry to a Google Spreadsheet (opens in a new tab).
Post a Slack message
Or whatever you can dream up.