Who should read the introduction?
The person opening the session, which is usually the host and, on a two-name page, often the same person who ran the invitations. A speaker introducing themselves costs the room credibility it should have gotten free; a third person reading a paragraph nobody wrote tends to fumble the speaker's name.
Should the spoken intro repeat the biography on the page?
It should agree with it, in one sentence. The page holds the full version for whoever wants detail. Out loud, take the credibility line and the coverage line and leave the rest, because a listener who has registered has usually already skimmed what you are reading.
How long should a webinar introduction be?
Around thirty seconds, four sentences, ending with the speaker's name. Sixty seconds is the practical maximum before people start checking their own tabs. If you need more, it belongs in the session description or an agenda chapter rather than in the handover.
Does the introduction need to name the meeting service?
Only in the host's own words, and only if it is genuinely useful — the join address each registrant received is what they need, not a brand name. Nothing here connects to a meeting service; you paste your own link and describe it however you like.
Can the written introduction be changed after publishing?
Yes. The speaker section and the description stay editable while the page keeps its address, so the paragraph you read out on the night can be corrected afterwards for the next session's visitors without touching anybody's registration.