In "Let's get started", the starting point is in view and "Let's get going", you are on the starting point already. Moreover, there is a sense of extra involvement abundantly made clear by the sentence, " Let's start going".
phrases - Let's get started! or let's get going? - English Language ...
Ok, let's look at this in terms of grammar. After all, the question asked which sentence is grammatically correct. First, let's get rid of some words that may be confusing the issue. "Who believes in this prophet" is describing, or defining, he/him. It is a restrictive clause. Its only purpose is to define he/him. As a restrictive clause, it is a descriptive clause. We can remove it to figure ...
As a rule, we don't use the passive voice with "let". "Allow" or "permit" is normally used instead: We were allowed to do whatever we wanted. We were permitted to drive the vehicle. Accordi...
Let go or be dragged. This is a saying often associated with Zen Buddhism (occasionally Stoicism). As far as I can tell, there's no historical connection, and it might well be originally English. ...
quotes - Origin of the saying "let go or be dragged" - English Language ...
infinitives - Passive of verb "let" : with or without "to" - English ...
Let’s is the English cohortative word, meaning “let us” in an exhortation of the group including the speaker to do something. Lets is the third person singular present tense form of the verb let meaning to permit or allow. In the questioner’s examples, the sentence means to say “Product (allows/permits you to) do something awesome”, so the form with lets is correct.