Changes to Soil pH. If vinegar concentrates are added to the soil instead of being sprayed onto plant foliage, they kill weeds by lowering the soil pH to a level that cannot sustain the plants. Depending on the soil type and the weather, this acidifying effect can take from a few months to a year.
Engagement rate is the percentage of people who saw a post that liked, shared, clicked or commented on it. To see the engagement rate for your posts: 1  At the top of your Page, click Insights. 2  Click Posts. 3  Scroll down to All Posts Published.
The average cost-per-thousand for Facebook ads (when purchased on an impressions basis) increased 140% in 2013, world-wide. Costs to advertise to mobile audiences on Facebook are quite a bit higher than the norm, with costs per click at 35 cents in fourth quarter of 2013, and costs per 1,000 impressions (CPM) at $5.41.