Korbanot: The Biblical Temple Sacrifices

 https://www.chabad.org/library/article_cdo/aid/4440323/jewish/Korbanot-The-Biblical-Temple-Sacrifices.htm

Sacrifices Today?

With the absence of a Temple and altar today, it is forbidden to offer sacrifices (see links below). However, our sages tell us that our prayers today are in place of the sacrifices.25 In addition to asking G‑d for our needs, prayer is a time to focus on self-improvement. It is a time when we “offer” our animal soul to G‑d, refining our animalistic tendencies and submitting them to His will.26

We pray for the time when the Third Temple will be rebuilt, where the sacrifices will be offered once more.

Links:
Can We Sacrifice a Paschal Lamb Nowadays?
Why Haven’t Jews Rebuilt the Temple Yet?
What Is Jewish Prayer?