What is the meaning of dot or title in Hebrew?

Answer 1

if you are referring to the dot inside Hebrew letters, it has multiple functions.

Dagesh Hazak = indicates the consonant is a double letter

Dagesh Kal = indicates that bet, pe, and kaf, have the sound of b, p, k rather than v, f, and k.

Mappiq = in a final he, indicates the "h" is pronounced (no longer followed).

If you are referring to any other dots in Hebrew, they are vowels.

Answer 2

The dots are vowels and other marks that indicate double letters, sound changes, and apiration changes.