Present Perfect Tense - Grammarly
https://www.grammarly.com/blog/present-perfect-tensePresent Perfect Tense. Grammarly. Grammar. The present perfect tense refers to an action or state that either occurred at an indefinite time in the past (e.g., we have talked before) or began in the past and continued to the present time (e.g., he has grown impatient over the last hour). This tense is formed by have/has + the past participle.
Present perfect - Wikipedia
https://en.wikipedia.org/wiki/Present_perfectThe present perfect is a grammatical combination of the present tense and perfect aspect that is used to express a past event that has present consequences. The term is used particularly in the context of English grammar to refer to forms like "I have finished". The forms are present because they use the present tense of the auxiliary verb have, and perfect because they use that …