Snapchat is a picture messaging application. You can take pictures, record video, add text and drawings. You want log in to Snapchat. See this guide:
Open a Web browser that you are using and type in the address: https://accounts.snapchat.com/accounts/login
You will get a guide as shown below:
- Enter your Username
- Enter your password
- Tick "Je ne suis pas un robot": Prove you're not a robot by typing the characters you see.
Finally, click "Connexion"