How effective is advertising on non-targeted Internet sites?

Question

Search Engine Optimization

On the Internet, there are sites that gather a fairly diverse audience. For example, fishing, culinary, book sites.

After all, many, not only housewives (although, of course, the majority of them), from time to time look for some recipe on the Internet and end up on a culinary site.

Books are read by the majority of the adult population => many people look for book reviews.

In general, every 4th man in the CIS is fond of fishing (according to unconfirmed statistics). Among the anglers, there are probably lawyers, and chefs, etc.

So the question is, how effective is advertising on non-targeted Internet sites? Of course, for a company that sells electrical equipment for rocket engines, it is very inefficient. And if we take a more general type of activity, for example, a company that creates websites. On culinary, book and even fishing resources, after all, there may be her clients. Or is this type of customer acquisition not working?

Answer 1

so no one will answer you, how do we know some kind of audience by age, sex and other signs
, just try, if you go buy more, no, no

Answer 2

So the question is, how effective is advertising on non-targeted Internet sites?

What kind of advertisement? YAN and CMS, Banner (a regular banner under an agreement with the site owner), promotional articles?

On culinary, book and even fishing resources, after all, there may be her clients. Or is this type of customer acquisition not working?

Again, what kind of advertising do you mean. If YAN and GMS, then you can safely place on such sites, because it is targeted by interests, previously entered queries in the search. Example. A person in a Yandex search entered the query "electrical equipment" and looked at the options on the sites. Yandex remembered this action. The next day, the same person went to a fishing site, and there he was met by YAN banners on electrical equipment. Is this advertisement effective? Undoubtedly.
If we are talking about a banner, then this approach is unlikely to give something positive. A banner on electrical equipment should be placed on the portals of electricians, b2b and other similar topics.
Non-thematic promotional posts usually host sites that sell links.

Answer 3

Here the question is brewing: "Why all this?" There is a directive for this. Advertising will be on any sites - but it will be exactly the person who fits the audience I need.
If you go further - there is a target in sms. The same bullshit.