What defines the inventory of mid tail websites?

The inventory of mid tail websites is defined by having limited inventory but moderate traffic. Mid tail websites typically fall in between major high-traffic sites and niche sites. They do not possess the extensive inventory of larger platforms that attract millions of visitors daily, nor do they cater to a very specific audience like niche sites. Instead, they have a balanced approach, featuring a decent amount of content or ad slots and attracting a reasonable but not overwhelming number of visitors. This makes them appealing to advertisers looking for a targeted audience without the high competition of larger sites.

The concept of limited inventory suggests that while these sites are not stuffed with an overwhelming number of ad placements, they do have enough space to provide meaningful advertising opportunities. This makes them attractive for advertisers seeking a balance between reach and specificity, allowing for effective targeting without the saturation found in high-volume environments.