Пожалуйста, подождите у входа: семинар скоро начнётся.

please

Breakdown of Пожалуйста, подождите у входа: семинар скоро начнётся.

• подождать: to wait
• вход: the entrance
• скоро: soon

Questions & Answers about Пожалуйста, подождите у входа: семинар скоро начнётся.

Why is there a comma after Пожалуйста?

Because пожалуйста is being used as a parenthetical politeness marker (please). In Russian it’s commonly set off with a comma when it introduces the request: Пожалуйста, подождите…
You may also see it without a comma in more casual writing, but the comma is very standard and “safe” in learners’ Russian.

Why is it подождите and not ждите?

Подождите is the imperative of the perfective verb подождать (“to wait a bit / to wait for some time until something happens”). It often implies a limited waiting period and sounds natural for “Please wait (here) [until we’re ready].”
Ждите is the imperfective imperative of ждать (“keep waiting / be waiting”), which can sound more open-ended or even harsher depending on context. In polite signs and announcements, подождите is extremely common.

What does the по- in подождите add?

The prefix по- often adds the nuance “for a while / a bit” to an action. So подождать is roughly “to wait a little / to wait for a short time,” compared with the more neutral ждать.

Why is it подождите (plural) if it could be addressed to one person?