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Iframe – An HTML document that is inside of another HTML document on a website. Iframes are used commonly to embed content from one source onto another web page.

Impression – A term used in Pay per click advertising that represents how many times an ad was shown.

Impression Share – Used in Pay per click advertising, this metric refers to the percentage of times viewers have seen an advertiser’s ad, in relation to the total possible amounts that ad could have been seen. If an ad campaign’s impression share is 70%, then the ads showed 7 out of 10 possible times.

Inbound Marketing – Inbound marketing refers to the activities and strategies used for attracting potential users or customers to a website. “Inbound” is a more recent euphemism for what has traditionally been called “SEO”. Inbound marketing is crucial to having a good web presence, as it’s used as a way to attract prospective customers by educating and building trust about your services, product and/or brand. (See also: organic)

Index – When used as a nound, index refers to all of the web pages that Google has crawled and stored to be shown to Google searchers (eg: “The Google index has billions of websites”). When used as a verb, it refers to the act of Google copying a web page into their system (eg: “Google indexed my website today so it will start appearing in their search results”).

IP Address – An IP (Internet Protocol) address is a unique number that identifies a device using the internet to communicate over a network. Each device has a unique IP address, and can be used to locate and differentiate that device from all other devices when using the internet.

You can find your public IP address by going to Google and searching “what is my ip address.”