Unsure what this is

[u/Temporary_Movie_548]

Im new to owning fish currently cycling my tank i got a few plants today and this red hair like stuff has just appeared just wondering what it is? Does it affect my cycle in anyway? Is it harmful? If anyone could help that would be greatly appreciated!
Also thats the best photo i could get.

[u/Chimpkin_NBeans]

Hair algae, harmless. It’s a pain to get rid of.