Hidden field in subscription form

[Gerhard]

What ist this hidden Input-Field for?
<input type="text" name="001cec531d8e2d2a84uhdjsie93i4b5vetwb383" tabindex="-1" autocomplete="001cec531d8e2d2a84uhdjsie93i4b5vetwb383" value="" />

 

[twisted1919]

it's the honeypot.

 

[Gerhard]

Ah cool - thank you!