This is the name given to a file that is sent along with an email.
An email attachment can be any type of file, including images (photos), videos, mp3s, documents, zipped files/folders, and more.
Bear these filesize limits in mind when sending attachments, the size of the attachment you are sending may be acceptable by your email provider, but may be too big for the recipient's email account.
Attaching a file to an email
To send a file (photo, document, etc) with an email you have to attach it in a special way to the email.
The process for attaching a file to your emails will vary depending on which email provider you use, or which program you use to compose your emails. Generally, look for a button or link when you are composing the email that says attach, attachments, attach file or edit attachments.
Usually you will be presented with a browse button, click on this button, navigate to the folder with the file in that you want to send, and then select the file.
To finish attaching the file will depend on the email provider's interface. If you are using an email client such as Outlook then the file will be attached automatically. If you are using a website such as Yahoo!, GMail or Hotmail to send your attachments, then follow the instructions on the screen.
Downloading the attachment from a received email
To download or view the attachment will again depend on your email provider or the program you use to retrieve your email. WARNING: downloading attachments can be dangerous, always scan any attachments for viruses before opening them with up-to-date anti-virus software. If using a mail client such as Outlook then there is normally an option under the FILE menu, such as save attachments (in outlook), select this and then choose where you want to save the file.
If you get your email via webmail (a website such as Yahoo, Gmail or Hotmail) then the process is usually straight forward. Look for a button or link such as save attachment, download attachment, get attachment, or something similar.
Your browser (if using webmail) may ask you whether you want to open or save the file, to download the file choose save/download and then navigate to the folder where you want to store the attachment.