Data Dictionery
Get to know your numbers
Last updated 20th June 2026
A plain-English glossary for small business owners. No jargon, just clarity.
The Data Dictionary
General/Cross Platform terms
Session — A single visit to your website. One person could have multiple sessions if they leave and come back later the same day.
Conversion — Any action you've decided matters — usually a sale, but could be a sign-up, a form submission, or a booking.
Conversion rate — The percentage of visitors who complete that action. (Conversions ÷ total visitors × 100)
Bounce rate — The percentage of people who land on a page and leave without clicking anything else. Not always bad — someone might land, get their answer, and leave happy.
Engagement rate — How actively people interact with your content (likes, comments, shares, saves) relative to how many people saw it.
Impressions — How many times something was shown, regardless of whether anyone clicked or engaged.
Reach — How many different people saw something (as opposed to impressions, which can count the same person multiple times).
Click-through rate (CTR) — The percentage of people who saw something and actually clicked it. (Clicks ÷ impressions × 100)
Website Traffic (Google analytics)
Users — The number of distinct people who visited your site in a given period.
Sessions — See above. Multiple sessions per user are normal.
Engaged sessions — A session where someone did something meaningful — stayed for a decent amount of time, viewed multiple pages, or completed a conversion.
Average engagement time — How long, on average, people actively spend on your site (not just having a tab open in the background).
Traffic source / channel — Where a visit came from: organic search, paid search, social, direct, referral, or email.
Direct traffic — Someone typed your URL straight in, or used a bookmark. Usually means they already know your brand.
Organic traffic — Visitors who found you through an unpaid search engine result.
Referral traffic — Visitors who clicked a link to your site from another website.
Landing page — The first page someone sees when they arrive on your site.
Exit page — The last page someone views before leaving your site.
Search Visibility (google search console)
Impressions — How many times your site appeared in search results for a given query.
Clicks — How many times someone actually clicked through from search results to your site.
Average position — Roughly where your site tends to rank in search results for a given term (position 1 = top of page one).
Query — The actual words someone typed into Google before finding you.
Index / Indexing — Google's process of "reading" and storing your pages so they can appear in search results. A page that isn't indexed can't be found via Google, however good it is.
Sitemap — A file that lists all your site's pages, helping Google find and understand your site's structure.
Social Media
Reach — See above; unique accounts that saw your content.
Impressions — See above; total views, including repeats.
Engagement — Likes, comments, shares, and saves combined.
Saves — Someone bookmarked your post to come back to later — a strong signal of genuine value.
Profile visits — How many people clicked through to view your profile after seeing a post.
Follower growth — Net change in followers over a period (new follows minus unfollows).
Story completion rate — The percentage of people who watched a Story all the way through rather than skipping or exiting.
Email Marketing
Open rate — The percentage of people who opened your email. (Opens ÷ emails delivered × 100)
Click rate (or CTR) — The percentage of recipients who clicked a link inside your email.
Unsubscribe rate — The percentage of recipients who opted out after a given email.
Deliverability — Whether your emails are actually reaching inboxes rather than being filtered to spam.
List growth rate — How quickly your subscriber list is growing (new subscribers minus unsubscribes, over time).
Segment — A specific group within your list, sorted by behaviour or characteristics (e.g. "customers who bought in the last 30 days").
Sales and ecommerce
Revenue — Total money taken in from sales, before any costs are deducted.
Average order value (AOV) — The average amount spent per order. (Revenue ÷ number of orders)
Customer acquisition cost (CAC) — How much it costs, on average, to gain one new customer (usually marketing spend ÷ new customers).
Customer lifetime value (LTV) — The total amount a customer is likely to spend with you over the whole time they're a customer, not just their first order.
Repeat customer rate — The percentage of customers who buy from you more than once.
Cart abandonment rate — The percentage of people who added something to their cart but didn't complete the purchase.
Gross profit — Revenue minus the direct cost of producing what you sold (materials, manufacturing, etc.) — not the same as revenue, and not the same as final profit either.
Google business profile
Profile views — How many people viewed your business listing.
Discovery search — Someone found your listing by searching a category or need (e.g. "florist near me") rather than your business name directly. A strong signal of new customer reach.
Direct search — Someone searched your business name or address specifically — they already knew about you.
Customer actions — Specific things people did after finding your profile: visited your website, requested directions, called you.