user18391: Few days ago I was watching a game review on lichess and found out one of the player's account was banned. Any idea why lichess does that?

user12873: The two main reasons:

Lichess detected that the player was very likely cheating.
The player used profanity or broke some rule of conduct.


user18168: First of all, lichess rarely bans players. What they usually do is flag their profile (usually for using chess computer assistance), remove their rating, and prevent them from p laying in tournaments and/or rating games. This is not a full ban.
To answer your question:
Lichess flags players for a variety of reasons, but (as mentioned above) they usually flag players for using chess computer assistance. They may also be flagged for sandbagging - artificially increasing or decreasing their rating.
If you want to know why are particular player was flagged, check their profile. There should be a large red banner informing you what has happened.
If you are wondering how the process of reporting/flagging players works, that would be a separate question.

18391: <p>Few days ago I was watching a game review on lichess and found out one of the player's account was banned. Any idea why lichess does that?</p>
 12873: <p>The two main reasons:</p>

<ul>
<li><p>Lichess detected that the player was very likely cheating.</p></li>
<li><p>The player used profanity or broke some rule of conduct.</p></li>
</ul>
 18168: <p>First of all, lichess rarely <em>bans</em> players. What they usually do is flag their profile (usually for using chess computer assistance), remove their rating, and prevent them from p laying in tournaments and/or rating games. This is not a full ban.</p>

<p>To answer your question:</p>

<p>Lichess flags players for a variety of reasons, but (as mentioned above) they usually flag players for using chess computer assistance. They may also be flagged for sandbagging - artificially increasing or decreasing their rating.</p>

<p>If you want to know why are particular player was flagged, check their profile. There should be a large red banner informing you what has happened.</p>

<p>If you are wondering how the process of reporting/flagging players works, that would be a separate question.</p>
