sich erinnern an
to remember
To recall information or an experience from memory.
Ich kann mich gut an unseren ersten gemeinsamen Urlaub erinnern.
I can remember our first vacation together well.

to remember / remind
Loading your saved state.
to remember
To recall information or an experience from memory.
Ich kann mich gut an unseren ersten gemeinsamen Urlaub erinnern.
I can remember our first vacation together well.

The structure of the sentence determines the meaning. 'Sich erinnern' (to remember, reflexive) means to recall one's own memory. 'Jemanden erinnern' (to remind someone, non-reflexive, with an object) means to help another person remember.
Ich erinnere mich an meine Kindheit.
I remember my childhood.
In all its main meanings, 'erinnern' (to remember/remind) is fixed with the preposition 'an' and the accusative. A common mistake is using the wrong case or a different preposition.
Erinnerst du dich noch an das Lied?
Do you still remember the song?
When the subject of the sentence is a thing, a place, or a smell, 'erinnern an' (to be reminiscent of / to remind someone of) means that it has a similarity to something else. In this case, the verb is not reflexive.
Dieses Parfüm erinnert mich an den Sommer in Italien.
This perfume reminds me of summer in Italy.
to forget
'vergessen' and 'erinnern' are opposites when it comes to memory. If someone forgets something, they no longer have it in mind or do not think of it in time. If someone remembers something, they bring it back into memory. There is also a risk of confusion because of the forms: 'sich erinnern an' means to remember something oneself; 'jemanden an etwas erinnern' means to help another person not forget it.

Meine Schwester erinnert mich immer an Geburtstage in der Familie.
My sister always reminds me of birthdays in the family.
Bitte vergiss den Termin beim Arzt morgen nicht.
Please don't forget the doctor's appointment tomorrow.