Players blame lag for shots that should have hit, but a large share of those moments come from tick rate. The server does not watch the match continuously; it samples it.
The server advances the world in steps
An authoritative server keeps the real state of the match and updates it on a fixed schedule, processing all inputs received since the previous step and producing a new snapshot.
Between two steps nothing officially happens. A player who moved during that gap is, as far as the server is concerned, still where the last step placed them.
Tick rate is simply how often that step runs. A higher rate means the gaps are shorter and the recorded world is closer to the continuous one.
Your client fills the gaps by guessing
Snapshots arrive too infrequently to draw from directly, so the client interpolates between the last two positions it received and predicts your own movement ahead of confirmation.
This is why other players glide smoothly rather than teleporting. What you see is a reconstruction built from sampled data, not a live feed of the server's memory.
The reconstruction is slightly behind. To interpolate between two known points, the client has to hold the newer one briefly before displaying it.
Lag compensation rewinds to your view
When you fire, the server does not test the shot against the present. It reconstructs where everyone was at the moment your screen showed the scene, then checks the line.
That is what makes shooting feel fair despite the delay, and it is also why players sometimes take damage after reaching cover on their own screen.
The rewind can only be as precise as the samples it rewinds to. Coarse sampling means the reconstructed position may sit a little away from where the target truly was.
Higher rates cost real money
Doubling the tick rate roughly doubles the simulation work per match and increases the number of packets sent to every player, multiplied across every server running.
Bandwidth and processing are recurring operating costs, so the chosen rate is a business decision as much as a technical one, and it varies between titles and even between modes.
Some games run a lower rate for casual playlists and a higher one for ranked, which is why the same weapon can feel inconsistent across queues.
What players actually perceive
Low tick rate rarely looks like stuttering. It shows up as duels that resolve strangely, as peeking advantages, and as replays that disagree with what the loser remembers.
Frame rate and tick rate are separate. A machine drawing hundreds of frames a second is still limited by how often the server agrees to record the world.
Improving your connection helps with latency but not with sampling. The step interval is set by the server, and no client-side change alters it.