The difference between Advertise and Alert

When used as verbs, advertise means to notify (someone) of something, whereas alert means to give warning to.

Alert is also noun with the meaning: an alarm.

Alert is also adjective with the meaning: attentive.

check bellow for the other definitions of Advertise and Alert

Advertise as a verb (transitive, now, _, rare):

To notify (someone) of something; to call someone's attention to something.
Advertise as a verb (transitive):

To give (especially public) notice of (something); to announce publicly.
Advertise as a verb (intransitive):

To provide information about a person or goods and services to influence others.

Examples:

"It pays to advertise."

"For personal needs, advertise on the internet or in a local newspaper."
Advertise as a verb (transitive):

To provide public information about (a product, service etc.) in order to attract public awareness and increase sales.

Examples:

"Over the air, they advertise their product on drive-time radio talk shows and TV news shows."

Alert as an adjective:

Attentive; awake; on guard.
Alert as an adjective (obsolete):

brisk; nimble; moving with celerity.