Yesterday, I saw many products are advertised on YouTure. The ads usually appear during the watch between some video on YouTube and made me feel annoyed because they showed too much on YouTube. However, It also had some videos that I'm so interested. For instance, Advertised of Grammarly, It's an application about online grammar and spelling checker that improves communication by helping users find and correct writing mistakes. When I saw this ad. I found the information and read reviews about it which the feedback is really good. I uploaded the application quickly and now I use it. It's easy to use I just write English language, if l have some mistakes such as I forgot to use v to be or I forgot to fill a an the. It will have red under the wrong word. I just click this word and then see how it's wrong? I write wrong or I forget to fill some words.