Hi I have 2 If functions:

=SUMIF(C3:C7;TRUE;B3:B7) and =COUNTIF(B2:I2;"=70")

Although I understand the equation behind it I always get confused as to
when I should use the " " . As from my examples one of they are required
only in one of these functions.

Could someone please make it easier for me to remember when any why they
should be used.

Thanks