Oh heck no, it does the opposite. Marketing makes you feel your life isn't good enough unless you buy this product or that. What makes me feel secure is trusting my gut and my assessments, questioning things, and not letting anyone or anything make me doubt or feel less about myself.

Not usually. I can think independently, and marketing ploys, if anything, usually annoy me because they assume I am gullible.

Marketing is propoganda. It has you (enough 'yous' to make it monetarily feasible) believe whatever 'it' wants 'you' to believe. One can ignore it so it doesn't affect one directly, but the indirect effects are felt. (This is my simplified version.)

Of course.

Only if you allow it.

My personality, my dogs and where I live.

No, it tells me about the availability of products on the market and l get to decide if l want to purchase any of the products. Works really well for me. If you are brainwashed by marketing, that says more about you than advertising.

Yes. Research shows it makes us (especially women) feel inadequate. But with the way advertising is marketing to men now, I'm sure they're catching up in the area of low self-worth

All advertising is made to make us feel that we urgently need or want someone. In some cases, it uses fear as the motivation for need or desire. Of course, it is designed to make inroads into our senses of security.

A broad and unspecific question deserves a broad and unspecific answer.

Yes

Definitely.

Yes.
Fear is a commodity.
. I don't feel insecure.