i was in lichess and suddenly it showed this

[Event "Rated Rapid game"]
[Site "lichess.org/mx5I9CCP"]
[Date "2022.08.09"]
[White "Gambit2Mate"]
[Black "Ragadingdong"]
[Result "1-0"]
[WhiteElo "2709"]
[BlackElo "2866"]
[TimeControl "480+0"]
[Termination "Normal"]
[UTCDate "2022.08.09"]
[UTCTime "09:09:06"]
[Variant "Standard"]
[ECO "D01"]
[Opening "Rapport-Jobava System"]
[Annotator "@Gambit2Mate"]

1. d4 { [%eval 0.0] [%clk 0:08:00] } 1... Nf6 { [%eval 0.23] [%clk 0:08:00] } 2. Nc3 { [%eval -0.08] [%clk 0:07:59] } 2... d5 { [%eval -0.02] [%clk 0:07:44] } 3. Bf4 { [%eval -0.13] [%clk 0:07:57] } 3... e6 { [%eval -0.02] } { Most played move by Black. Natural and black is looking to develop his pieces quickly. } { [%clk 0:07:33] } 4. Nb5 { [%eval 0.0] [%clk 0:07:55] } 4... Na6 { [%eval 0.0] } { Nb5 is new Jobava London theory, Old theory suggested playing e3 but Nb5 threatens the c7 pawn with a forked check. Black has to move his knight to a6 to defend the attack. And now is completely misplaced. } { [%clk 0:07:28] } 5. e3 { [%eval -0.09] [%clk 0:07:52] } 5... Be7 { [%eval -0.13] [%clk 0:07:19] } 6. Nf3 { [%eval -0.13] [%clk 0:07:45] } 6... O-O { [%eval -0.01] [%clk 0:07:18] } 7. g4?! { [%eval -0.56] } { Inaccuracy. h3 was best. } { g4! One of my favorite moves and very thematic in the Jobava London. Starting Kingside attack. If Nxg4 it opens up a nice file for my rook on the next move. } { [%clk 0:07:35] } (7. h3 c6 8. Nc3 c5 9. Be2 Qb6 10. Qc1 Bd7 11. a4 Qa5) 7... c5 { [%eval -0.31] [%clk 0:07:06] } 8. c3 { [%eval -0.16] [%clk 0:07:23] } 8... Ne4 { [%eval 0.14] [%clk 0:06:42] } 9. a4 { [%eval -0.34] [%clk 0:07:04] } 9... Bd7?! { [%eval 0.53] } { Inaccuracy. f6 was best. } { [%clk 0:06:33] } (9... f6 10. h3) 10. h4?! { [%eval -0.27] } { Inaccuracy. Bd3 was best. } { Cant play g4 without having Harry come along for the attack. } { [%clk 0:06:48] } (10. Bd3) 10... c4?! { [%eval 0.5] } { Inaccuracy. f6 was best. } { [%clk 0:05:49] } (10... f6 11. Nd2 Nxd2 12. Qxd2 cxd4 13. exd4 e5 14. dxe5 Bxg4 15. Be2 fxe5 16. Bxe5 Bxe2 17. Qxe2) 11. g5 { [%eval 0.49] [%clk 0:06:33] } 11... Bxb5 { [%eval 0.54] [%clk 0:05:41] } 12. axb5 { [%eval 0.57] [%clk 0:06:29] } 12... Nc7 { [%eval 0.56] [%clk 0:05:40] } 13. Ne5 { [%eval 0.9] } { Centralizing my knight } { [%clk 0:05:56] } 13... Nxb5 { [%eval 0.49] [%clk 0:05:29] } 14. Qg4 { [%eval 0.8] [%clk 0:05:54] } 14... Nc7?! { [%eval 1.45] } { Inaccuracy. Ba3 was best. } { [%clk 0:04:46] } (14... Ba3 15. Rxa3) 15. Bh3?! { [%eval 0.81] } { Inaccuracy. f3 was best. } { [%clk 0:05:33] } (15. f3 Nd6) 15... Kh8?! { [%eval 1.95] } { Inaccuracy. Bd6 was best. } { Not sure the point of Kh8. White now has all of his pieces and pawns storming towards the Black king. } { [%clk 0:04:18] } (15... Bd6 16. Qg2) 16. Rg1 { [%eval 1.59] [%clk 0:05:29] } 16... Qe8? { [%eval 3.03] } { Mistake. a5 was best. } { [%clk 0:03:48] } (16... a5 17. f3) 17. h5?! { [%eval 2.18] } { Inaccuracy. f3 was best. } { [%clk 0:05:14] } (17. f3 Nd6) 17... g6?? { [%eval 5.6] } { Blunder. Qb5 was best. } { Blunder. Qh4 was a much better move. With hxg6 trying to open up the king even more, followed by sacking my knight for a more vulnerable king. } { [%clk 0:03:06] } (17... Qb5 18. Qe2) 18. hxg6?? { [%eval 2.71] } { Blunder. Qh4 was best. } { [%clk 0:04:24] } (18. Qh4 Nd6 (18... Bd8) 19. Bg4 Rg8 20. Nxg6+ fxg6 21. Be5+ Rg7 22. h6 Kg8 23. hxg7 h5 24. Qh2 Qf7) 18... fxg6 { [%eval 2.66] [%clk 0:03:01] } 19. Nxg6+ { [%eval 2.16] [%clk 0:04:06] } 19... Qxg6 { [%eval 2.54] [%clk 0:02:54] } 20. Bxc7 { [%eval 2.34] [%clk 0:04:05] } 20... Nxf2? { [%eval 4.34] } { Mistake. Rf5 was best. } { [%clk 0:02:39] } (20... Rf5 21. Be5+) 21. Be5+ { [%eval 2.96] [%clk 0:03:45] } 21... Bf6 { [%eval 5.97] [%clk 0:02:16] } 22. gxf6 { [%eval 5.45] } { Queen sac for a knight and a pawn allows me full control of the g file, tempi on Blacks queen and a strong pawn on f6 covering the Kings dark squares g7 and e7. } { [%clk 0:03:44] } 22... Nxg4 { [%eval 5.77] [%clk 0:02:13] } 23. Rxg4 { [%eval 5.91] [%clk 0:03:40] } 23... Qf7 { [%eval 6.25] [%clk 0:02:06] } 24. O-O-O?? { [%eval 2.6] } { Blunder. Rg7 was best. } { Bringing my other rook into the attack isn’t liked by the engine. } { [%clk 0:03:25] } (24. Rg7) 24... Rg8 { [%eval 3.79] [%clk 0:01:49] } 25. Rdg1?? { [%eval 1.44] } { Blunder. Rh1 was best. } { [%clk 0:02:44] } (25. Rh1 h6 26. Rh4 Rg6 27. Bg4 Kh7 28. Bh5 Rag8 29. Bd1 Rh8 30. Bc2 Kg8 31. Bxg6 Qxg6) (25. Rxg8+ Kxg8 26. Rg1+) 25... Rxg4?? { [%eval 4.13] } { Blunder. Rg6 was best. } { [%clk 0:01:25] } (25... Rg6 26. R4g2) 26. Bxg4 { [%eval 4.0] [%clk 0:02:44] } (26. Rxg4) 26... Rg8 { [%eval 4.73] [%clk 0:01:19] } 27. Rg3 { [%eval 4.58] [%clk 0:02:34] } 27... Re8? { [%eval 13.0] } { Mistake. Rxg4 was best. } { [%clk 0:00:54] } (27... Rxg4 28. Rxg4) 28. Rh3? { [%eval 5.14] } { Mistake. Bh5 was best. } { [%clk 0:02:22] } (28. Bh5 Rf8 29. Bxf7 Rxf7 30. Rg7 Rf8 31. f7 h5 32. Rg8+ Kh7 33. Rxf8 Kg6 34. Rg8+ Kxf7) 28... Rg8? { [%eval 9.91] } { Mistake. Rf8 was best. } { [%clk 0:00:46] } (28... Rf8 29. Bh5 Qxf6 30. Bxf6+ Rxf6 31. Be2 b5 32. e4 dxe4 33. Rh4 e3 34. Rh3 a6 35. Rxe3) 29. Bh5 { [%eval 7.81] } { Nothing black can do besides give some checks or give up their queen. Pawn on f6 controls kings dark and and escape square. Both bishops are engaged in the attack with a strong rook x-ray ing the king on h3. } { [%clk 0:02:14] } 29... Rg1+ { [%eval 8.18] [%clk 0:00:43] } 30. Kd2 { [%eval 8.54] [%clk 0:02:08] } 30... Rg2+ { [%eval 8.16] [%clk 0:00:42] } 31. Ke1 { [%eval 8.67] } { 1-0 Black resigns. } { [%clk 0:02:06] } 1-0

what is this?

If you want feedback to a possible bug or similar it's better to post in the category "Lichess Feedback".

I don't know what you mean by "it showed this", but what you pasted here is the PGN for the game. It's a file format for storing chess games, annotations, and metadata, so you can import the game into another website or chess program.

@pigeonpal said in #3:
> I don't know what you mean by "it showed this", but what you pasted here is the PGN for the game. It's a file format for storing chess games, annotations, and metadata, so you can import the game into another website or chess program.

o ok thanks