What does the underlined phrase "keeping tabs on" in paragraph 3 probably mean?

第三段中划线短语 “keep tabs on” 可能是什么意思？

youdao

One nonprofit organization, which monitors the treatment of animals in filmed entertainment, is keeping tabs on more than 2,000 productions this year.

一个监管娱乐节目拍摄中动物待遇的非营利组织今年正在密切关注2000多部作品。

youdao

So keeping tabs on the illness in animals is a big focus of flu research.

所以为动物疾病打标签做记录是流感研究的一大关注点。

youdao

Keeping tabs on deals done in distant countries by hard-up or inexperienced universities can be tricky.

ECONOMIST: Universities

This is where I sit, keeping tabs on the torrent of information that enters my stream.

FORBES: Swimming With Information Sharks (And Snooki)

This Twitter tracker will be keeping tabs on which VMA moments are going off on Twitter.

FORBES: VMAs: How MTV Will Unleash Big Data To Entertain Us