How to advertise the bulletin board as cheaply and effectively as possible?

Question

Search Engine Optimization

Normally there is advertising on TV, but it's expensive. What interesting things do you offer?

Answer 1

social networks go well the same inst

Answer 2

The cheapest as above said instagram. But here you need to take into account the specifics of the promoted content.
You can pay attention depending on the target audience on FB, VK, OK.
You can try to promote with the context, but it will be more expensive, although the results will be optimal if the settings are good.