Pre seed? 🤔

Sarah-Jane • TTC 16 months💏We did it🤰🏽Sophie born 10/7/18💕
I've seen a few posts about pre seed, is this a lube? Would u only use it if you were a bit more dry or does it not matter at all? I've been off my pill since Oct and just had a 2nd AF so considering any help so I can conceive quicker 😊 I have a 9 year old daughter and conceived in about 5 months. Any advice welcome (I use OPKs, bbt and CM checks already) but was wondering if any success stories using this pre seed?