A family of Microsoft spreadsheet software with tools for analyzing, charting, and communicating data.
If you want to get only one information (cell) from the other sheet you can use
B2: =VLOOKUP(A2,Sheet2!A:B,2,0)
https://support.office.com/en-us/article/vlookup-function-0bbc8083-26fe-4963-8ab8-93a18ad188a1
If the information is in a different column, e.g. column K, use MATCH/INDEX
B2: =INDEX(Sheet2!K:K,MATCH(A2,Sheet2!A:A,0))
If you want to get more information's from the other sheet, I suggest to use MATCH in a helper column and use the cell reference within INDEX, because the term has to be searched only once.
B2: =MATCH(A2,Sheet2!A:A,0)
C2: =INDEX(Sheet2!B:B,$B2)
drag C2 to the right till the end of your data.
https://support.office.com/en-us/article/match-function-e8dffd45-c762-47d6-bf89-533f4a37673a
https://support.office.com/en-us/article/index-function-a5dcf0dd-996d-40a4-a822-b56b061328bd
If you need further help please share your (sample) file.
Andreas.