Concerning numbers between groups of three digits, don't put a full stop, but a non-breaking space:
Ex: 4 500 000.
General rule: no space before the fullstop and space after.
The comma indicates a short pause and serves to separate the parts of a sentence.
Don't place a comma between a subject and a verb.
Don't not place a comma before a bracket, parenthesis, hyphen, but after.
We usually place a comma before "etc.. .
General rule: no space before and space after.
The semicolon is usually placed between two independent proposals and indicates a link with the preceding sentence:
General rule: non-breaking space before the semicolon and space after the semicolon.
The colon announce a list or a quotation.
Before a quotation: they are followed by French quotes.
General rule: non-breaking space before and space after the colon. No capital after.
The question mark is placed at the end of an interrogative sentence.
General rule: non-breaking space before the question mark and space after.
The exclamation point is placed at the end of exclamatory sentence or end of an interjection
General rule: non-breaking space before the exclamation mark and space after.
The dots are always three in number, and mark a hesitation, a thought not expressed or are placed following a list too long.
General rule: no space before the dot and space after.
Parentheses are used to isolate a sentence in a passage relating to a point, to detail or supporting a fact.
General rule: the space before and space after parentheses, but no space inside.
The dash is used to mark the change of interlocutor in a dialogue, detail an observation within a sentence (it looks much better than the parentheses), or to submit a list.
General rule: non-breaking space after. If within a phrase, breaking space before, space after.
This symbol indicates a reference to be developed end of the article.
General rule: no space between the asterisk and the word that precedes it, but after breaking space. (Example: Note * or: * This refers to our article ...)
It is often seen written: etc. ... It is a mistake. One point will be fine.
Titles and subtitles
There is no punctuation in the titles and subtitles. The font change (bold or italic) is ample.
Try to make the font size larger so there is no confusion about the meaning of the title.