Does call tracking make sense in this case, and how important are your own phone numbers?

Question

Telephony

If there are 1-3 calls per day, but each client is valuable and I would like to track the effectiveness of advertising, and for this I would like to understand which of the ads the calls are associated with, then do I understand correctly that call tracking makes sense even with a small number of calls?
And how important is it to acquire your own numbers, and not use those offered in call tracking services? There is an idea that a potential client can write down a temporary phone number issued by the call tracking service, and in the future they will not get through or get through to a competitor.
P.S. the question was created in Yandex metrics. I don't know what category to put it in.

Answer 1

but each client is valuable and I would like to track the effectiveness of advertising, and to do this, understand which of the ads are associated with calls

call tracking makes sense even with a small number of calls

It seems you answered your own question without the help of the community...

And how important it is to acquire your own numbers, and not use those offered in call tracking services

Do not reinvent the wheel, the game is not worth the candle.

There is an idea that a potential client can write down a temporary phone number

1. Write down, according to my observations, 2-5%.
2. Well, they will write it down, so what? You will still see the source of the call, slightly with less data, because. You will rent specific rooms, and no one will use them except you.

and in the future they will not get through or get through to a competitor

When renting specific rooms - not possible.

P.S. the question was created in Yandex metrics. I don't know what category to put it in.

P.S. corrected!