what the use of start off when start give the meaning

[herbiji]

Hello teachers ..
I came across to this sentences which confussed me
" I have been forming a routine to start my week off in the right
direction."
I cheacked the dictionary to see what does it mean
I found that it mean " start "
my question here is that why we use ( off ) with (start) to give the meaning of ( start ) as a single ..
and when we use ( off ) with (start )
thanks in advance

[Mister Micawber]

.
Off here is I think a sort of intensifier-- it heightens the image. Its source is probably the adverb meaning from a particular thing or place or position (`forth' is obsolete) (Example: "Went off to school").
.

[herbiji]

thanks a lot dear
Do you mean that we use off with such verbs when we need to heighten the image of any action
again thanks teacher

[Mister Micawber]

.
I wouldn't presume that this is an all-inclusive, or even a predominant, use-- just one of the meanings of off: I finished off the pizza.
.

[herbiji]

I got it ..thanks
but what about this sentence
" All I have in this world up for sale , for a flag and free land .
why do we use up here when omitting it won't change the meaning ?
I just confuss with such sentence

regards

[Mister Micawber]

.
Again, such adverbs had colour or dimension to the statement. Up here means presented/displayed/advertised/'up on the auction block'.
.

[herbiji]

Oh!!! thanks a lot teacher for you help