When you visit a website, you are of course observable by the site itself, but you are also observable by third-party trackers that the site embeds in its code. You might be sur It is the circuit that has its path open as uncompleted path so that the current doesn't complete its circulation around the circuit. This will cause the current to be zero and the voltage around the terminals to be as maximum making the open circuit resistance equals to infinity. The elements after the open circuit point will not be connected to the circuit because of current can't reach there. The circuit is not closed between positive and return path is considered as open circuit.
Open-circuit voltage - Wikipedia
The circuit in the previous section is not a very practical one. In fact, it can be quite dangerous to build directly connecting the poles of a voltage source together with a single piece of wire. The reason it is dangerous is that the magnitude of electric current may be very large in such a short circuit , and the release of energy may be very dramatic usually in the form of heat. Usually, electric circuits are constructed in such a way as to make practical use of that released energy, in as safe a manner as possible. One practical and popular use of electric current is for the operation of electric lighting.
Open circuit and short circuit are two special terms that represent opposite extremes of the resistance number line. This means there is zero voltage difference for any current value. Note that real wires have non-zero resistance! This means that zero current can flow between the two terminals, regardless of any voltage difference. Note that very high voltages can cause arcs of current to flow even over large air or vacuum gaps!